---
_id: '11980'
abstract:
- lang: eng
text: Small organic radicals are ubiquitous intermediates in photocatalysis and
are used in organic synthesis to install functional groups and to tune electronic
properties and pharmacokinetic parameters of the final molecule. Development of
new methods to generate small organic radicals with added functionality can further
extend the utility of photocatalysis for synthetic needs. Herein, we present a
method to generate dichloromethyl radicals from chloroform using a heterogeneous
potassium poly(heptazine imide) (K-PHI) photocatalyst under visible light irradiation
for C1-extension of the enone backbone. The method is applied on 15 enones, with
γ,γ-dichloroketones yields of 18–89%. Due to negative zeta-potential (−40 mV)
and small particle size (100 nm) K-PHI suspension is used in quasi-homogeneous
flow-photoreactor increasing the productivity by 19 times compared to the batch
approach. The resulting γ,γ-dichloroketones, are used as bifunctional building
blocks to access value-added organic compounds such as substituted furans and
pyrroles.
article_number: '1387'
article_processing_charge: No
article_type: original
author:
- first_name: Stefano
full_name: Mazzanti, Stefano
last_name: Mazzanti
- first_name: Bogdan
full_name: Kurpil, Bogdan
last_name: Kurpil
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Markus
full_name: Antonietti, Markus
last_name: Antonietti
- first_name: Aleksandr
full_name: Savateev, Aleksandr
last_name: Savateev
citation:
ama: Mazzanti S, Kurpil B, Pieber B, Antonietti M, Savateev A. Dichloromethylation
of enones by carbon nitride photocatalysis. Nature Communications. 2020;11.
doi:10.1038/s41467-020-15131-0
apa: Mazzanti, S., Kurpil, B., Pieber, B., Antonietti, M., & Savateev, A. (2020).
Dichloromethylation of enones by carbon nitride photocatalysis. Nature Communications.
Springer Nature. https://doi.org/10.1038/s41467-020-15131-0
chicago: Mazzanti, Stefano, Bogdan Kurpil, Bartholomäus Pieber, Markus Antonietti,
and Aleksandr Savateev. “Dichloromethylation of Enones by Carbon Nitride Photocatalysis.”
Nature Communications. Springer Nature, 2020. https://doi.org/10.1038/s41467-020-15131-0.
ieee: S. Mazzanti, B. Kurpil, B. Pieber, M. Antonietti, and A. Savateev, “Dichloromethylation
of enones by carbon nitride photocatalysis,” Nature Communications, vol.
11. Springer Nature, 2020.
ista: Mazzanti S, Kurpil B, Pieber B, Antonietti M, Savateev A. 2020. Dichloromethylation
of enones by carbon nitride photocatalysis. Nature Communications. 11, 1387.
mla: Mazzanti, Stefano, et al. “Dichloromethylation of Enones by Carbon Nitride
Photocatalysis.” Nature Communications, vol. 11, 1387, Springer Nature,
2020, doi:10.1038/s41467-020-15131-0.
short: S. Mazzanti, B. Kurpil, B. Pieber, M. Antonietti, A. Savateev, Nature Communications
11 (2020).
date_created: 2022-08-25T11:10:15Z
date_published: 2020-03-13T00:00:00Z
date_updated: 2023-02-21T10:10:14Z
day: '13'
doi: 10.1038/s41467-020-15131-0
extern: '1'
intvolume: ' 11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1038/s41467-020-15131-0
month: '03'
oa: 1
oa_version: Published Version
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Dichloromethylation of enones by carbon nitride photocatalysis
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2020'
...
---
_id: '11986'
abstract:
- lang: eng
text: Carbon nitride materials have emerged as an efficient and sustainable class
of heterogeneous photocatalysts, particularly when paired with nickel in dual
catalytic cross-coupling reactions. Performing these transformations on larger
scales using a continuous process is difficult due to the problems associated
with handling solids in flow. By combining an oscillatory pump with a microstructured
plug flow photoreactor, a stable suspension of the photocatalyst can be maintained,
circumventing clogging of the reactor channels. Through careful tuning of the
oscillator properties, the residence time distribution (RTD) was optimized, whilst
maintaining a stable catalyst suspension. Short residence times (20 min) were
achieved using optimized conditions and the recyclability of the photocatalyst
was demonstrated over 10 cycles with no loss of activity. During a stable 4.5
hour scale-out demonstration, the model substrate could be isolated on 12 g scale
(90% yield, 2.67 g h−1). Moreover, the method was applied for the gram scale synthesis
of an intermediate of the active pharmaceutical ingredient tetracaine.
article_processing_charge: No
article_type: original
author:
- first_name: Cristian
full_name: Rosso, Cristian
last_name: Rosso
- first_name: Sebastian
full_name: Gisbertz, Sebastian
last_name: Gisbertz
- first_name: Jason D.
full_name: Williams, Jason D.
last_name: Williams
- first_name: Hannes P. L.
full_name: Gemoets, Hannes P. L.
last_name: Gemoets
- first_name: Wouter
full_name: Debrouwer, Wouter
last_name: Debrouwer
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: C. Oliver
full_name: Kappe, C. Oliver
last_name: Kappe
citation:
ama: Rosso C, Gisbertz S, Williams JD, et al. An oscillatory plug flow photoreactor
facilitates semi-heterogeneous dual nickel/carbon nitride photocatalytic C–N couplings.
Reaction Chemistry and Engineering. 2020;5(3):597-604. doi:10.1039/d0re00036a
apa: Rosso, C., Gisbertz, S., Williams, J. D., Gemoets, H. P. L., Debrouwer, W.,
Pieber, B., & Kappe, C. O. (2020). An oscillatory plug flow photoreactor facilitates
semi-heterogeneous dual nickel/carbon nitride photocatalytic C–N couplings. Reaction
Chemistry and Engineering. Royal Society of Chemistry. https://doi.org/10.1039/d0re00036a
chicago: Rosso, Cristian, Sebastian Gisbertz, Jason D. Williams, Hannes P. L. Gemoets,
Wouter Debrouwer, Bartholomäus Pieber, and C. Oliver Kappe. “An Oscillatory Plug
Flow Photoreactor Facilitates Semi-Heterogeneous Dual Nickel/Carbon Nitride Photocatalytic
C–N Couplings.” Reaction Chemistry and Engineering. Royal Society of Chemistry,
2020. https://doi.org/10.1039/d0re00036a.
ieee: C. Rosso et al., “An oscillatory plug flow photoreactor facilitates
semi-heterogeneous dual nickel/carbon nitride photocatalytic C–N couplings,” Reaction
Chemistry and Engineering, vol. 5, no. 3. Royal Society of Chemistry, pp.
597–604, 2020.
ista: Rosso C, Gisbertz S, Williams JD, Gemoets HPL, Debrouwer W, Pieber B, Kappe
CO. 2020. An oscillatory plug flow photoreactor facilitates semi-heterogeneous
dual nickel/carbon nitride photocatalytic C–N couplings. Reaction Chemistry and
Engineering. 5(3), 597–604.
mla: Rosso, Cristian, et al. “An Oscillatory Plug Flow Photoreactor Facilitates
Semi-Heterogeneous Dual Nickel/Carbon Nitride Photocatalytic C–N Couplings.” Reaction
Chemistry and Engineering, vol. 5, no. 3, Royal Society of Chemistry, 2020,
pp. 597–604, doi:10.1039/d0re00036a.
short: C. Rosso, S. Gisbertz, J.D. Williams, H.P.L. Gemoets, W. Debrouwer, B. Pieber,
C.O. Kappe, Reaction Chemistry and Engineering 5 (2020) 597–604.
date_created: 2022-08-25T11:45:02Z
date_published: 2020-03-01T00:00:00Z
date_updated: 2024-10-14T12:06:11Z
day: '01'
doi: 10.1039/d0re00036a
extern: '1'
intvolume: ' 5'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1039/D0RE00036A
month: '03'
oa: 1
oa_version: Published Version
page: 597-604
publication: Reaction Chemistry and Engineering
publication_identifier:
eissn:
- 2058-9883
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: An oscillatory plug flow photoreactor facilitates semi-heterogeneous dual nickel/carbon
nitride photocatalytic C–N couplings
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2020'
...
---
_id: '12188'
abstract:
- lang: eng
text: Molecular mechanisms enabling the switching and maintenance of epigenetic
states are not fully understood. Distinct histone modifications are often associated
with ON/OFF epigenetic states, but how these states are stably maintained through
DNA replication, yet in certain situations switch from one to another remains
unclear. Here, we address this problem through identification of Arabidopsis INCURVATA11
(ICU11) as a Polycomb Repressive Complex 2 accessory protein. ICU11 robustly immunoprecipitated
in vivo with PRC2 core components and the accessory proteins, EMBRYONIC FLOWER
1 (EMF1), LIKE HETEROCHROMATIN PROTEIN1 (LHP1), and TELOMERE_REPEAT_BINDING FACTORS
(TRBs). ICU11 encodes a 2-oxoglutarate-dependent dioxygenase, an activity associated
with histone demethylation in other organisms, and mutant plants show defects
in multiple aspects of the Arabidopsis epigenome. To investigate its primary molecular
function we identified the Arabidopsis FLOWERING LOCUS C (FLC) as a direct target
and found icu11 disrupted the cold-induced, Polycomb-mediated silencing underlying
vernalization. icu11 prevented reduction in H3K36me3 levels normally seen during
the early cold phase, supporting a role for ICU11 in H3K36me3 demethylation. This
was coincident with an attenuation of H3K27me3 at the internal nucleation site
in FLC, and reduction in H3K27me3 levels across the body of the gene after plants
were returned to the warm. Thus, ICU11 is required for the cold-induced epigenetic
switching between the mutually exclusive chromatin states at FLC, from the active
H3K36me3 state to the silenced H3K27me3 state. These data support the importance
of physical coupling of histone modification activities to promote epigenetic
switching between opposing chromatin states.
acknowledgement: We would like to thank Scott Berry for help with ICU-GFP nuclear
localization microscopy, Hao Yu and Lisha Shen for assistance with 6mA DNA methylation
analysis, Donna Gibson for graphic design assistance, and members of the C.D. and
Howard laboratories for helpful discussions. This work was funded by the European
Research Council grants to “MEXTIM” (to C.D.) and “SexMeth” (to X. Feng), by the
Biotechnological and Biological Sciences Research Council (BBSRC) Institute Strategic
Programmes GRO (BB/J004588/1), GEN (BB/P013511/1), BBSRC grant (to X. Feng) (BB/S009620/1),
and the Marie Sklodowska–Curie Postdoctoral Fellowships “UNRAVEL” (to R.H.B.) and
"WISDOM" (to X. Fang). Additional funding via the Wellcome Trust through a Senior
Research Fellowship (to J.R.) (103139) and a multiuser equipment grant (108504).
The Wellcome Centre for Cell Biology is supported by core funding from the Wellcome
Trust (203149).
article_processing_charge: No
article_type: original
author:
- first_name: Rebecca H.
full_name: Bloomer, Rebecca H.
last_name: Bloomer
- first_name: Claire E.
full_name: Hutchison, Claire E.
last_name: Hutchison
- first_name: Isabel
full_name: Bäurle, Isabel
last_name: Bäurle
- first_name: James
full_name: Walker, James
last_name: Walker
- first_name: Xiaofeng
full_name: Fang, Xiaofeng
last_name: Fang
- first_name: Pumi
full_name: Perera, Pumi
last_name: Perera
- first_name: Christos N.
full_name: Velanis, Christos N.
last_name: Velanis
- first_name: Serin
full_name: Gümüs, Serin
last_name: Gümüs
- first_name: Christos
full_name: Spanos, Christos
last_name: Spanos
- first_name: Juri
full_name: Rappsilber, Juri
last_name: Rappsilber
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
- first_name: Justin
full_name: Goodrich, Justin
last_name: Goodrich
- first_name: Caroline
full_name: Dean, Caroline
last_name: Dean
citation:
ama: Bloomer RH, Hutchison CE, Bäurle I, et al. The Arabidopsis epigenetic regulator
ICU11 as an accessory protein of polycomb repressive complex 2. Proceedings
of the National Academy of Sciences. 2020;117(28):16660-16666. doi:10.1073/pnas.1920621117
apa: Bloomer, R. H., Hutchison, C. E., Bäurle, I., Walker, J., Fang, X., Perera,
P., … Dean, C. (2020). The Arabidopsis epigenetic regulator ICU11 as an accessory
protein of polycomb repressive complex 2. Proceedings of the National Academy
of Sciences. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1920621117
chicago: Bloomer, Rebecca H., Claire E. Hutchison, Isabel Bäurle, James Walker,
Xiaofeng Fang, Pumi Perera, Christos N. Velanis, et al. “The Arabidopsis Epigenetic
Regulator ICU11 as an Accessory Protein of Polycomb Repressive Complex 2.” Proceedings
of the National Academy of Sciences. Proceedings of the National Academy of
Sciences, 2020. https://doi.org/10.1073/pnas.1920621117.
ieee: R. H. Bloomer et al., “The Arabidopsis epigenetic regulator ICU11
as an accessory protein of polycomb repressive complex 2,” Proceedings of the
National Academy of Sciences, vol. 117, no. 28. Proceedings of the National
Academy of Sciences, pp. 16660–16666, 2020.
ista: Bloomer RH, Hutchison CE, Bäurle I, Walker J, Fang X, Perera P, Velanis CN,
Gümüs S, Spanos C, Rappsilber J, Feng X, Goodrich J, Dean C. 2020. The Arabidopsis
epigenetic regulator ICU11 as an accessory protein of polycomb repressive complex
2. Proceedings of the National Academy of Sciences. 117(28), 16660–16666.
mla: Bloomer, Rebecca H., et al. “The Arabidopsis Epigenetic Regulator ICU11 as
an Accessory Protein of Polycomb Repressive Complex 2.” Proceedings of the
National Academy of Sciences, vol. 117, no. 28, Proceedings of the National
Academy of Sciences, 2020, pp. 16660–66, doi:10.1073/pnas.1920621117.
short: R.H. Bloomer, C.E. Hutchison, I. Bäurle, J. Walker, X. Fang, P. Perera, C.N.
Velanis, S. Gümüs, C. Spanos, J. Rappsilber, X. Feng, J. Goodrich, C. Dean, Proceedings
of the National Academy of Sciences 117 (2020) 16660–16666.
date_created: 2023-01-16T09:15:44Z
date_published: 2020-05-22T00:00:00Z
date_updated: 2023-05-08T10:53:55Z
day: '22'
ddc:
- '580'
department:
- _id: XiFe
doi: 10.1073/pnas.1920621117
extern: '1'
external_id:
pmid:
- '32601198'
file:
- access_level: open_access
checksum: cedee184cb12f454f2fba4158ff47db9
content_type: application/pdf
creator: alisjak
date_created: 2023-02-07T11:29:55Z
date_updated: 2023-02-07T11:29:55Z
file_id: '12526'
file_name: 2020_PNAS_Bloomer.pdf
file_size: 1105414
relation: main_file
success: 1
file_date_updated: 2023-02-07T11:29:55Z
has_accepted_license: '1'
intvolume: ' 117'
issue: '28'
keyword:
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7368280/
month: '05'
oa: 1
oa_version: Published Version
page: 16660-16666
pmid: 1
publication: Proceedings of the National Academy of Sciences
publication_identifier:
issn:
- 0027-8424
- 1091-6490
publication_status: published
publisher: Proceedings of the National Academy of Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: The Arabidopsis epigenetic regulator ICU11 as an accessory protein of polycomb
repressive complex 2
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 117
year: '2020'
...
---
_id: '12189'
abstract:
- lang: eng
text: Meiotic crossovers (COs) are important for reshuffling genetic information
between homologous chromosomes and they are essential for their correct segregation.
COs are unevenly distributed along chromosomes and the underlying mechanisms controlling
CO localization are not well understood. We previously showed that meiotic COs
are mis-localized in the absence of AXR1, an enzyme involved in the neddylation/rubylation
protein modification pathway in Arabidopsis thaliana. Here, we report that in
axr1-/-, male meiocytes show a strong defect in chromosome pairing whereas the
formation of the telomere bouquet is not affected. COs are also redistributed
towards subtelomeric chromosomal ends where they frequently form clusters, in
contrast to large central regions depleted in recombination. The CO suppressed
regions correlate with DNA hypermethylation of transposable elements (TEs) in
the CHH context in axr1-/- meiocytes. Through examining somatic methylomes, we
found axr1-/- affects DNA methylation in a plant, causing hypermethylation in
all sequence contexts (CG, CHG and CHH) in TEs. Impairment of the main pathways
involved in DNA methylation is epistatic over axr1-/- for DNA methylation in somatic
cells but does not restore regular chromosome segregation during meiosis. Collectively,
our findings reveal that the neddylation pathway not only regulates hormonal perception
and CO distribution but is also, directly or indirectly, a major limiting pathway
of TE DNA methylation in somatic cells.
acknowledgement: The authors wish to thank Cécile Raynaud, Eric Jenczewski, Rajeev
Kumar, Raphaël Mercier and Jean Molinier for critical reading of the manuscript.
article_number: e1008894
article_processing_charge: No
article_type: original
author:
- first_name: Nicolas
full_name: Christophorou, Nicolas
last_name: Christophorou
- first_name: Wenjing
full_name: She, Wenjing
last_name: She
- first_name: Jincheng
full_name: Long, Jincheng
last_name: Long
- first_name: Aurélie
full_name: Hurel, Aurélie
last_name: Hurel
- first_name: Sébastien
full_name: Beaubiat, Sébastien
last_name: Beaubiat
- first_name: Yassir
full_name: Idir, Yassir
last_name: Idir
- first_name: Marina
full_name: Tagliaro-Jahns, Marina
last_name: Tagliaro-Jahns
- first_name: Aurélie
full_name: Chambon, Aurélie
last_name: Chambon
- first_name: Victor
full_name: Solier, Victor
last_name: Solier
- first_name: Daniel
full_name: Vezon, Daniel
last_name: Vezon
- first_name: Mathilde
full_name: Grelon, Mathilde
last_name: Grelon
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
- first_name: Nicolas
full_name: Bouché, Nicolas
last_name: Bouché
- first_name: Christine
full_name: Mézard, Christine
last_name: Mézard
citation:
ama: Christophorou N, She W, Long J, et al. AXR1 affects DNA methylation independently
of its role in regulating meiotic crossover localization. PLOS Genetics.
2020;16(6). doi:10.1371/journal.pgen.1008894
apa: Christophorou, N., She, W., Long, J., Hurel, A., Beaubiat, S., Idir, Y., …
Mézard, C. (2020). AXR1 affects DNA methylation independently of its role in regulating
meiotic crossover localization. PLOS Genetics. Public Library of Science
(PLoS). https://doi.org/10.1371/journal.pgen.1008894
chicago: Christophorou, Nicolas, Wenjing She, Jincheng Long, Aurélie Hurel, Sébastien
Beaubiat, Yassir Idir, Marina Tagliaro-Jahns, et al. “AXR1 Affects DNA Methylation
Independently of Its Role in Regulating Meiotic Crossover Localization.” PLOS
Genetics. Public Library of Science (PLoS), 2020. https://doi.org/10.1371/journal.pgen.1008894.
ieee: N. Christophorou et al., “AXR1 affects DNA methylation independently
of its role in regulating meiotic crossover localization,” PLOS Genetics,
vol. 16, no. 6. Public Library of Science (PLoS), 2020.
ista: Christophorou N, She W, Long J, Hurel A, Beaubiat S, Idir Y, Tagliaro-Jahns
M, Chambon A, Solier V, Vezon D, Grelon M, Feng X, Bouché N, Mézard C. 2020. AXR1
affects DNA methylation independently of its role in regulating meiotic crossover
localization. PLOS Genetics. 16(6), e1008894.
mla: Christophorou, Nicolas, et al. “AXR1 Affects DNA Methylation Independently
of Its Role in Regulating Meiotic Crossover Localization.” PLOS Genetics,
vol. 16, no. 6, e1008894, Public Library of Science (PLoS), 2020, doi:10.1371/journal.pgen.1008894.
short: N. Christophorou, W. She, J. Long, A. Hurel, S. Beaubiat, Y. Idir, M. Tagliaro-Jahns,
A. Chambon, V. Solier, D. Vezon, M. Grelon, X. Feng, N. Bouché, C. Mézard, PLOS
Genetics 16 (2020).
date_created: 2023-01-16T09:16:10Z
date_published: 2020-06-29T00:00:00Z
date_updated: 2023-05-08T10:54:39Z
day: '29'
department:
- _id: XiFe
doi: 10.1371/journal.pgen.1008894
extern: '1'
external_id:
pmid:
- '32598340'
intvolume: ' 16'
issue: '6'
keyword:
- Cancer Research
- Genetics (clinical)
- Genetics
- Molecular Biology
- Ecology
- Evolution
- Behavior and Systematics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7351236/
month: '06'
oa: 1
oa_version: Published Version
pmid: 1
publication: PLOS Genetics
publication_identifier:
issn:
- 1553-7404
publication_status: published
publisher: Public Library of Science (PLoS)
quality_controlled: '1'
scopus_import: '1'
status: public
title: AXR1 affects DNA methylation independently of its role in regulating meiotic
crossover localization
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2020'
...
---
_id: '13361'
abstract:
- lang: eng
text: "In nature, light is harvested by photoactive proteins to drive a range of
biological processes, including photosynthesis, phototaxis, vision, and ultimately
life. Bacteriorhodopsin, for example, is a protein embedded within archaeal cell
membranes that binds the chromophore retinal within its hydrophobic pocket. Exposure
to light triggers regioselective photoisomerization of the confined retinal, which
in turn initiates a cascade of conformational changes within the protein, triggering
proton flux against the concentration gradient, providing the microorganisms with
the energy to live. We are inspired by these functions in nature to harness light
energy using synthetic photoswitches under confinement. Like retinal, synthetic
photoswitches require some degree of conformational flexibility to isomerize.
In nature, the conformational change associated with retinal isomerization is
accommodated by the structural flexibility of the opsin host, yet it results in
steric communication between the chromophore and the protein. Similarly, we strive
to design systems wherein isomerization of confined photoswitches results in steric
communication between a photoswitch and its confining environment. To achieve
this aim, a balance must be struck between molecular crowding and conformational
freedom under confinement: too much crowding prevents switching, whereas too much
freedom resembles switching of isolated molecules in solution, preventing communication.\r\n\r\nIn
this Account, we discuss five classes of synthetic light-switchable compounds—diarylethenes,
anthracenes, azobenzenes, spiropyrans, and donor–acceptor Stenhouse adducts—comparing
their behaviors under confinement and in solution. The environments employed to
confine these photoswitches are diverse, ranging from planar surfaces to nanosized
cavities within coordination cages, nanoporous frameworks, and nanoparticle aggregates.
The trends that emerge are primarily dependent on the nature of the photoswitch
and not on the material used for confinement. In general, we find that photoswitches
requiring less conformational freedom for switching are, as expected, more straightforward
to isomerize reversibly under confinement. Because these compounds undergo only
small structural changes upon isomerization, however, switching does not propagate
into communication with their environment. Conversely, photoswitches that require
more conformational freedom are more challenging to switch under confinement but
also can influence system-wide behavior.\r\n\r\nAlthough we are primarily interested
in the effects of geometric constraints on photoswitching under confinement, additional
effects inevitably emerge when a compound is removed from solution and placed
within a new, more crowded environment. For instance, we have found that compounds
that convert to zwitterionic isomers upon light irradiation often experience stabilization
of these forms under confinement. This effect results from the mutual stabilization
of zwitterions that are brought into close proximity on surfaces or within cavities.
Furthermore, photoswitches can experience preorganization under confinement, influencing
the selectivity and efficiency of their photoreactions. Because intermolecular
interactions arising from confinement cannot be considered independently from
the effects of geometric constraints, we describe all confinement effects concurrently
throughout this Account."
article_processing_charge: No
article_type: original
author:
- first_name: Angela B.
full_name: Grommet, Angela B.
last_name: Grommet
- first_name: Lucia M.
full_name: Lee, Lucia M.
last_name: Lee
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Grommet AB, Lee LM, Klajn R. Molecular photoswitching in confined spaces. Accounts
of Chemical Research. 2020;53(11):2600-2610. doi:10.1021/acs.accounts.0c00434
apa: Grommet, A. B., Lee, L. M., & Klajn, R. (2020). Molecular photoswitching
in confined spaces. Accounts of Chemical Research. American Chemical Society.
https://doi.org/10.1021/acs.accounts.0c00434
chicago: Grommet, Angela B., Lucia M. Lee, and Rafal Klajn. “Molecular Photoswitching
in Confined Spaces.” Accounts of Chemical Research. American Chemical Society,
2020. https://doi.org/10.1021/acs.accounts.0c00434.
ieee: A. B. Grommet, L. M. Lee, and R. Klajn, “Molecular photoswitching in confined
spaces,” Accounts of Chemical Research, vol. 53, no. 11. American Chemical
Society, pp. 2600–2610, 2020.
ista: Grommet AB, Lee LM, Klajn R. 2020. Molecular photoswitching in confined spaces.
Accounts of Chemical Research. 53(11), 2600–2610.
mla: Grommet, Angela B., et al. “Molecular Photoswitching in Confined Spaces.” Accounts
of Chemical Research, vol. 53, no. 11, American Chemical Society, 2020, pp.
2600–10, doi:10.1021/acs.accounts.0c00434.
short: A.B. Grommet, L.M. Lee, R. Klajn, Accounts of Chemical Research 53 (2020)
2600–2610.
date_created: 2023-08-01T09:35:50Z
date_published: 2020-11-17T00:00:00Z
date_updated: 2024-10-14T12:12:31Z
day: '17'
doi: 10.1021/acs.accounts.0c00434
extern: '1'
external_id:
pmid:
- '32969638'
intvolume: ' 53'
issue: '11'
keyword:
- General Medicine
- General Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/acs.accounts.0c00434
month: '11'
oa: 1
oa_version: Published Version
page: 2600-2610
pmid: 1
publication: Accounts of Chemical Research
publication_identifier:
eissn:
- 1520-4898
issn:
- 0001-4842
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Molecular photoswitching in confined spaces
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 53
year: '2020'
...
---
_id: '13362'
abstract:
- lang: eng
text: Aggregation of organic molecules can drastically affect their physicochemical
properties. For instance, the optical properties of BODIPY dyes are inherently
related to the degree of aggregation and the mutual orientation of BODIPY units
within these aggregates. Whereas the noncovalent aggregation of various BODIPY
dyes has been studied in diverse media, the ill-defined nature of these aggregates
has made it difficult to elucidate the structure–property relationships. Here,
we studied the encapsulation of three structurally simple BODIPY derivatives within
the hydrophobic cavity of a water-soluble, flexible PdII6L4 coordination cage.
The cavity size allowed for the selective encapsulation of two dye molecules,
irrespective of the substitution pattern on the BODIPY core. Working with a model,
a pentamethyl-substituted derivative, we found that the mutual orientation of
two BODIPY units in the cage’s cavity was remarkably similar to that in the crystalline
state of the free dye, allowing us to isolate and characterize the smallest possible
noncovalent H-type BODIPY aggregate, namely, an H-dimer. Interestingly, a CF3-substituted
BODIPY, known for forming J-type aggregates, was also encapsulated as an H-dimer.
Taking advantage of the dynamic nature of encapsulation, we developed a system
in which reversible switching between H- and J-aggregates can be induced for multiple
cycles simply by addition and subsequent destruction of the cage. We expect that
the ability to rapidly and reversibly manipulate the optical properties of supramolecular
inclusion complexes in aqueous media will open up avenues for developing detection
systems that operate within biological environments.
article_processing_charge: No
article_type: original
author:
- first_name: Julius
full_name: Gemen, Julius
last_name: Gemen
- first_name: Johannes
full_name: Ahrens, Johannes
last_name: Ahrens
- first_name: Linda J. W.
full_name: Shimon, Linda J. W.
last_name: Shimon
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Gemen J, Ahrens J, Shimon LJW, Klajn R. Modulating the optical properties of
BODIPY dyes by noncovalent dimerization within a flexible coordination cage. Journal
of the American Chemical Society. 2020;142(41):17721-17729. doi:10.1021/jacs.0c08589
apa: Gemen, J., Ahrens, J., Shimon, L. J. W., & Klajn, R. (2020). Modulating
the optical properties of BODIPY dyes by noncovalent dimerization within a flexible
coordination cage. Journal of the American Chemical Society. American Chemical
Society. https://doi.org/10.1021/jacs.0c08589
chicago: Gemen, Julius, Johannes Ahrens, Linda J. W. Shimon, and Rafal Klajn. “Modulating
the Optical Properties of BODIPY Dyes by Noncovalent Dimerization within a Flexible
Coordination Cage.” Journal of the American Chemical Society. American
Chemical Society, 2020. https://doi.org/10.1021/jacs.0c08589.
ieee: J. Gemen, J. Ahrens, L. J. W. Shimon, and R. Klajn, “Modulating the optical
properties of BODIPY dyes by noncovalent dimerization within a flexible coordination
cage,” Journal of the American Chemical Society, vol. 142, no. 41. American
Chemical Society, pp. 17721–17729, 2020.
ista: Gemen J, Ahrens J, Shimon LJW, Klajn R. 2020. Modulating the optical properties
of BODIPY dyes by noncovalent dimerization within a flexible coordination cage.
Journal of the American Chemical Society. 142(41), 17721–17729.
mla: Gemen, Julius, et al. “Modulating the Optical Properties of BODIPY Dyes by
Noncovalent Dimerization within a Flexible Coordination Cage.” Journal of the
American Chemical Society, vol. 142, no. 41, American Chemical Society, 2020,
pp. 17721–29, doi:10.1021/jacs.0c08589.
short: J. Gemen, J. Ahrens, L.J.W. Shimon, R. Klajn, Journal of the American Chemical
Society 142 (2020) 17721–17729.
date_created: 2023-08-01T09:36:10Z
date_published: 2020-10-04T00:00:00Z
date_updated: 2024-10-14T12:12:41Z
day: '04'
doi: 10.1021/jacs.0c08589
extern: '1'
external_id:
pmid:
- '33006898'
intvolume: ' 142'
issue: '41'
keyword:
- Colloid and Surface Chemistry
- Biochemistry
- General Chemistry
- Catalysis
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/jacs.0c08589
month: '10'
oa: 1
oa_version: Published Version
page: 17721-17729
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Modulating the optical properties of BODIPY dyes by noncovalent dimerization
within a flexible coordination cage
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 142
year: '2020'
...
---
_id: '13363'
abstract:
- lang: eng
text: Temporal activation of biological processes by visible light and subsequent
return to an inactive state in the absence of light is an essential characteristic
of photoreceptor cells. Inspired by these phenomena, light-responsive materials
are very attractive due to the high spatiotemporal control of light irradiation,
with light being able to precisely orchestrate processes repeatedly over many
cycles. Herein, it is reported that light-driven proton transfer triggered by
a merocyanine-based photoacid can be used to modulate the permeability of pH-responsive
polymersomes through cyclic, temporally controlled protonation and deprotonation
of the polymersome membrane. The membranes can undergo repeated light-driven swelling–contraction
cycles without losing functional effectiveness. When applied to enzyme loaded-nanoreactors,
this membrane responsiveness is used for the reversible control of enzymatic reactions.
This combination of the merocyanine-based photoacid and pH-switchable nanoreactors
results in rapidly responding and versatile supramolecular systems successfully
used to switch enzymatic reactions ON and OFF on demand.
article_number: '2002135'
article_processing_charge: No
article_type: original
author:
- first_name: Silvia
full_name: Moreno, Silvia
last_name: Moreno
- first_name: Priyanka
full_name: Sharan, Priyanka
last_name: Sharan
- first_name: Johanna
full_name: Engelke, Johanna
last_name: Engelke
- first_name: Hannes
full_name: Gumz, Hannes
last_name: Gumz
- first_name: Susanne
full_name: Boye, Susanne
last_name: Boye
- first_name: Ulrich
full_name: Oertel, Ulrich
last_name: Oertel
- first_name: Peng
full_name: Wang, Peng
last_name: Wang
- first_name: Susanta
full_name: Banerjee, Susanta
last_name: Banerjee
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Brigitte
full_name: Voit, Brigitte
last_name: Voit
- first_name: Albena
full_name: Lederer, Albena
last_name: Lederer
- first_name: Dietmar
full_name: Appelhans, Dietmar
last_name: Appelhans
citation:
ama: Moreno S, Sharan P, Engelke J, et al. Light‐driven proton transfer for cyclic
and temporal switching of enzymatic nanoreactors. Small. 2020;16(37). doi:10.1002/smll.202002135
apa: Moreno, S., Sharan, P., Engelke, J., Gumz, H., Boye, S., Oertel, U., … Appelhans,
D. (2020). Light‐driven proton transfer for cyclic and temporal switching of enzymatic
nanoreactors. Small. Wiley. https://doi.org/10.1002/smll.202002135
chicago: Moreno, Silvia, Priyanka Sharan, Johanna Engelke, Hannes Gumz, Susanne
Boye, Ulrich Oertel, Peng Wang, et al. “Light‐driven Proton Transfer for Cyclic
and Temporal Switching of Enzymatic Nanoreactors.” Small. Wiley, 2020.
https://doi.org/10.1002/smll.202002135.
ieee: S. Moreno et al., “Light‐driven proton transfer for cyclic and temporal
switching of enzymatic nanoreactors,” Small, vol. 16, no. 37. Wiley, 2020.
ista: Moreno S, Sharan P, Engelke J, Gumz H, Boye S, Oertel U, Wang P, Banerjee
S, Klajn R, Voit B, Lederer A, Appelhans D. 2020. Light‐driven proton transfer
for cyclic and temporal switching of enzymatic nanoreactors. Small. 16(37), 2002135.
mla: Moreno, Silvia, et al. “Light‐driven Proton Transfer for Cyclic and Temporal
Switching of Enzymatic Nanoreactors.” Small, vol. 16, no. 37, 2002135,
Wiley, 2020, doi:10.1002/smll.202002135.
short: S. Moreno, P. Sharan, J. Engelke, H. Gumz, S. Boye, U. Oertel, P. Wang, S.
Banerjee, R. Klajn, B. Voit, A. Lederer, D. Appelhans, Small 16 (2020).
date_created: 2023-08-01T09:36:48Z
date_published: 2020-08-11T00:00:00Z
date_updated: 2023-08-07T10:11:41Z
day: '11'
doi: 10.1002/smll.202002135
extern: '1'
external_id:
pmid:
- '32783385'
intvolume: ' 16'
issue: '37'
keyword:
- Biomaterials
- Biotechnology
- General Materials Science
- General Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1002/smll.202002135
month: '08'
oa: 1
oa_version: Published Version
pmid: 1
publication: Small
publication_identifier:
eissn:
- 1613-6829
issn:
- 1613-6810
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Light‐driven proton transfer for cyclic and temporal switching of enzymatic
nanoreactors
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2020'
...
---
_id: '13364'
abstract:
- lang: eng
text: Photochromic molecules undergo reversible isomerization upon irradiation with
light at different wavelengths, a process that can alter their physical and chemical
properties. For instance, dihydropyrene (DHP) is a deep-colored compound that
isomerizes to light-brown cyclophanediene (CPD) upon irradiation with visible
light. CPD can then isomerize back to DHP upon irradiation with UV light or thermally
in the dark. Conversion between DHP and CPD is thought to proceed via a biradical
intermediate; bimolecular events involving this unstable intermediate thus result
in rapid decomposition and poor cycling performance. Here, we show that the reversible
isomerization of DHP can be stabilized upon confinement within a PdII6L4 coordination
cage. By protecting this reactive intermediate using the cage, each isomerization
reaction proceeds to higher yield, which significantly decreases the fatigue experienced
by the system upon repeated photocycling. Although molecular confinement is known
to help stabilize reactive species, this effect is not typically employed to protect
reactive intermediates and thus improve reaction yields. We envisage that performing
reactions under confinement will not only improve the cyclic performance of photochromic
molecules, but may also increase the amount of product obtainable from traditionally
low-yielding organic reactions.
article_processing_charge: No
article_type: original
author:
- first_name: Martina
full_name: Canton, Martina
last_name: Canton
- first_name: Angela B.
full_name: Grommet, Angela B.
last_name: Grommet
- first_name: Luca
full_name: Pesce, Luca
last_name: Pesce
- first_name: Julius
full_name: Gemen, Julius
last_name: Gemen
- first_name: Shiming
full_name: Li, Shiming
last_name: Li
- first_name: Yael
full_name: Diskin-Posner, Yael
last_name: Diskin-Posner
- first_name: Alberto
full_name: Credi, Alberto
last_name: Credi
- first_name: Giovanni M.
full_name: Pavan, Giovanni M.
last_name: Pavan
- first_name: Joakim
full_name: Andréasson, Joakim
last_name: Andréasson
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Canton M, Grommet AB, Pesce L, et al. Improving fatigue resistance of dihydropyrene
by encapsulation within a coordination cage. Journal of the American Chemical
Society. 2020;142(34):14557-14565. doi:10.1021/jacs.0c06146
apa: Canton, M., Grommet, A. B., Pesce, L., Gemen, J., Li, S., Diskin-Posner, Y.,
… Klajn, R. (2020). Improving fatigue resistance of dihydropyrene by encapsulation
within a coordination cage. Journal of the American Chemical Society. American
Chemical Society. https://doi.org/10.1021/jacs.0c06146
chicago: Canton, Martina, Angela B. Grommet, Luca Pesce, Julius Gemen, Shiming Li,
Yael Diskin-Posner, Alberto Credi, Giovanni M. Pavan, Joakim Andréasson, and Rafal
Klajn. “Improving Fatigue Resistance of Dihydropyrene by Encapsulation within
a Coordination Cage.” Journal of the American Chemical Society. American
Chemical Society, 2020. https://doi.org/10.1021/jacs.0c06146.
ieee: M. Canton et al., “Improving fatigue resistance of dihydropyrene by
encapsulation within a coordination cage,” Journal of the American Chemical
Society, vol. 142, no. 34. American Chemical Society, pp. 14557–14565, 2020.
ista: Canton M, Grommet AB, Pesce L, Gemen J, Li S, Diskin-Posner Y, Credi A, Pavan
GM, Andréasson J, Klajn R. 2020. Improving fatigue resistance of dihydropyrene
by encapsulation within a coordination cage. Journal of the American Chemical
Society. 142(34), 14557–14565.
mla: Canton, Martina, et al. “Improving Fatigue Resistance of Dihydropyrene by Encapsulation
within a Coordination Cage.” Journal of the American Chemical Society,
vol. 142, no. 34, American Chemical Society, 2020, pp. 14557–65, doi:10.1021/jacs.0c06146.
short: M. Canton, A.B. Grommet, L. Pesce, J. Gemen, S. Li, Y. Diskin-Posner, A.
Credi, G.M. Pavan, J. Andréasson, R. Klajn, Journal of the American Chemical Society
142 (2020) 14557–14565.
date_created: 2023-08-01T09:36:59Z
date_published: 2020-08-14T00:00:00Z
date_updated: 2023-08-07T10:15:38Z
day: '14'
doi: 10.1021/jacs.0c06146
extern: '1'
external_id:
pmid:
- '32791832'
intvolume: ' 142'
issue: '34'
keyword:
- Colloid and Surface Chemistry
- Biochemistry
- General Chemistry
- Catalysis
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/jacs.0c06146
month: '08'
oa: 1
oa_version: Published Version
page: 14557-14565
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Improving fatigue resistance of dihydropyrene by encapsulation within a coordination
cage
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 142
year: '2020'
...
---
_id: '13365'
abstract:
- lang: eng
text: Photoswitchable molecules are employed for many applications, from the development
of active materials to the design of stimuli-responsive molecular systems and
light-powered molecular machines. To fully exploit their potential, we must learn
ways to control the mechanism and kinetics of their photoinduced isomerization.
One possible strategy involves confinement of photoresponsive switches such as
azobenzenes or spiropyrans within crowded molecular environments, which may allow
control over their light-induced conversion. However, the molecular factors that
influence and control the switching process under realistic conditions and within
dynamic molecular regimes often remain difficult to ascertain. As a case study,
here we have employed molecular models to probe the isomerization of azobenzene
guests within a Pd(II)-based coordination cage host in water. Atomistic molecular
dynamics and metadynamics simulations allow us to characterize the flexibility
of the cage in the solvent, the (rare) guest encapsulation and release events,
and the relative probability/kinetics of light-induced isomerization of azobenzene
analogues in these host–guest systems. In this way, we can reconstruct the mechanism
of azobenzene switching inside the cage cavity and explore key molecular factors
that may control this event. We obtain a molecular-level insight on the effects
of crowding and host–guest interactions on azobenzene isomerization. The detailed
picture elucidated by this study may enable the rational design of photoswitchable
systems whose reactivity can be controlled via host–guest interactions.
article_processing_charge: No
article_type: original
author:
- first_name: Luca
full_name: Pesce, Luca
last_name: Pesce
- first_name: Claudio
full_name: Perego, Claudio
last_name: Perego
- first_name: Angela B.
full_name: Grommet, Angela B.
last_name: Grommet
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Giovanni M.
full_name: Pavan, Giovanni M.
last_name: Pavan
citation:
ama: Pesce L, Perego C, Grommet AB, Klajn R, Pavan GM. Molecular factors controlling
the isomerization of Azobenzenes in the cavity of a flexible coordination cage.
Journal of the American Chemical Society. 2020;142(21):9792-9802. doi:10.1021/jacs.0c03444
apa: Pesce, L., Perego, C., Grommet, A. B., Klajn, R., & Pavan, G. M. (2020).
Molecular factors controlling the isomerization of Azobenzenes in the cavity of
a flexible coordination cage. Journal of the American Chemical Society.
American Chemical Society. https://doi.org/10.1021/jacs.0c03444
chicago: Pesce, Luca, Claudio Perego, Angela B. Grommet, Rafal Klajn, and Giovanni
M. Pavan. “Molecular Factors Controlling the Isomerization of Azobenzenes in the
Cavity of a Flexible Coordination Cage.” Journal of the American Chemical Society.
American Chemical Society, 2020. https://doi.org/10.1021/jacs.0c03444.
ieee: L. Pesce, C. Perego, A. B. Grommet, R. Klajn, and G. M. Pavan, “Molecular
factors controlling the isomerization of Azobenzenes in the cavity of a flexible
coordination cage,” Journal of the American Chemical Society, vol. 142,
no. 21. American Chemical Society, pp. 9792–9802, 2020.
ista: Pesce L, Perego C, Grommet AB, Klajn R, Pavan GM. 2020. Molecular factors
controlling the isomerization of Azobenzenes in the cavity of a flexible coordination
cage. Journal of the American Chemical Society. 142(21), 9792–9802.
mla: Pesce, Luca, et al. “Molecular Factors Controlling the Isomerization of Azobenzenes
in the Cavity of a Flexible Coordination Cage.” Journal of the American Chemical
Society, vol. 142, no. 21, American Chemical Society, 2020, pp. 9792–802,
doi:10.1021/jacs.0c03444.
short: L. Pesce, C. Perego, A.B. Grommet, R. Klajn, G.M. Pavan, Journal of the American
Chemical Society 142 (2020) 9792–9802.
date_created: 2023-08-01T09:37:12Z
date_published: 2020-04-30T00:00:00Z
date_updated: 2023-08-07T10:18:53Z
day: '30'
doi: 10.1021/jacs.0c03444
extern: '1'
external_id:
pmid:
- '32353237'
intvolume: ' 142'
issue: '21'
keyword:
- Colloid and Surface Chemistry
- Biochemistry
- General Chemistry
- Catalysis
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/jacs.0c03444
month: '04'
oa: 1
oa_version: Published Version
page: 9792-9802
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Molecular factors controlling the isomerization of Azobenzenes in the cavity
of a flexible coordination cage
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 142
year: '2020'
...
---
_id: '13367'
abstract:
- lang: eng
text: Confining molecules can fundamentally change their chemical and physical properties.
Confinement effects are considered instrumental at various stages of the origins
of life, and life continues to rely on layers of compartmentalization to maintain
an out-of-equilibrium state and efficiently synthesize complex biomolecules under
mild conditions. As interest in synthetic confined systems grows, we are realizing
that the principles governing reactivity under confinement are the same in abiological
systems as they are in nature. In this Review, we categorize the ways in which
nanoconfinement effects impact chemical reactivity in synthetic systems. Under
nanoconfinement, chemical properties can be modulated to increase reaction rates,
enhance selectivity and stabilize reactive species. Confinement effects also lead
to changes in physical properties. The fluorescence of light emitters, the colours
of dyes and electronic communication between electroactive species can all be
tuned under confinement. Within each of these categories, we elucidate design
principles and strategies that are widely applicable across a range of confined
systems, specifically highlighting examples of different nanocompartments that
influence reactivity in similar ways.
article_processing_charge: No
article_type: original
author:
- first_name: Angela B.
full_name: Grommet, Angela B.
last_name: Grommet
- first_name: Moran
full_name: Feller, Moran
last_name: Feller
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Grommet AB, Feller M, Klajn R. Chemical reactivity under nanoconfinement. Nature
Nanotechnology. 2020;15:256-271. doi:10.1038/s41565-020-0652-2
apa: Grommet, A. B., Feller, M., & Klajn, R. (2020). Chemical reactivity under
nanoconfinement. Nature Nanotechnology. Springer Nature. https://doi.org/10.1038/s41565-020-0652-2
chicago: Grommet, Angela B., Moran Feller, and Rafal Klajn. “Chemical Reactivity
under Nanoconfinement.” Nature Nanotechnology. Springer Nature, 2020. https://doi.org/10.1038/s41565-020-0652-2.
ieee: A. B. Grommet, M. Feller, and R. Klajn, “Chemical reactivity under nanoconfinement,”
Nature Nanotechnology, vol. 15. Springer Nature, pp. 256–271, 2020.
ista: Grommet AB, Feller M, Klajn R. 2020. Chemical reactivity under nanoconfinement.
Nature Nanotechnology. 15, 256–271.
mla: Grommet, Angela B., et al. “Chemical Reactivity under Nanoconfinement.” Nature
Nanotechnology, vol. 15, Springer Nature, 2020, pp. 256–71, doi:10.1038/s41565-020-0652-2.
short: A.B. Grommet, M. Feller, R. Klajn, Nature Nanotechnology 15 (2020) 256–271.
date_created: 2023-08-01T09:37:39Z
date_published: 2020-04-17T00:00:00Z
date_updated: 2024-10-14T12:13:35Z
day: '17'
doi: 10.1038/s41565-020-0652-2
extern: '1'
external_id:
pmid:
- '32303705'
intvolume: ' 15'
keyword:
- Electrical and Electronic Engineering
- Condensed Matter Physics
- General Materials Science
- Biomedical Engineering
- Atomic and Molecular Physics
- and Optics
- Bioengineering
language:
- iso: eng
month: '04'
oa_version: None
page: 256-271
pmid: 1
publication: Nature Nanotechnology
publication_identifier:
eissn:
- 1748-3395
issn:
- 1748-3387
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Chemical reactivity under nanoconfinement
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 15
year: '2020'
...
---
_id: '13368'
abstract:
- lang: eng
text: Scanning nanoscale superconducting quantum interference devices (nanoSQUIDs)
are of growing interest for highly sensitive quantitative imaging of magnetic,
spintronic, and transport properties of low-dimensional systems. Utilizing specifically
designed grooved quartz capillaries pulled into a sharp pipette, we have fabricated
the smallest SQUID-on-tip (SOT) devices with effective diameters down to 39 nm.
Integration of a resistive shunt in close proximity to the pipette apex combined
with self-aligned deposition of In and Sn, has resulted in SOTs with a flux noise
of 42 nΦ0 Hz−1/2, yielding a record low spin noise of 0.29 μB Hz−1/2. In addition,
the new SOTs function at sub-Kelvin temperatures and in high magnetic fields of
over 2.5 T. Integrating the SOTs into a scanning probe microscope allowed us to
image the stray field of a single Fe3O4 nanocube at 300 mK. Our results show that
the easy magnetization axis direction undergoes a transition from the 〈111〉 direction
at room temperature to an in-plane orientation, which could be attributed to the
Verwey phase transition in Fe3O4.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Y.
full_name: Anahory, Y.
last_name: Anahory
- first_name: H. R.
full_name: Naren, H. R.
last_name: Naren
- first_name: E. O.
full_name: Lachman, E. O.
last_name: Lachman
- first_name: S.
full_name: Buhbut Sinai, S.
last_name: Buhbut Sinai
- first_name: A.
full_name: Uri, A.
last_name: Uri
- first_name: L.
full_name: Embon, L.
last_name: Embon
- first_name: E.
full_name: Yaakobi, E.
last_name: Yaakobi
- first_name: Y.
full_name: Myasoedov, Y.
last_name: Myasoedov
- first_name: M. E.
full_name: Huber, M. E.
last_name: Huber
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: E.
full_name: Zeldov, E.
last_name: Zeldov
citation:
ama: Anahory Y, Naren HR, Lachman EO, et al. SQUID-on-tip with single-electron spin
sensitivity for high-field and ultra-low temperature nanomagnetic imaging. Nanoscale.
2020;12(5):3174-3182. doi:10.1039/c9nr08578e
apa: Anahory, Y., Naren, H. R., Lachman, E. O., Buhbut Sinai, S., Uri, A., Embon,
L., … Zeldov, E. (2020). SQUID-on-tip with single-electron spin sensitivity for
high-field and ultra-low temperature nanomagnetic imaging. Nanoscale. Royal
Society of Chemistry. https://doi.org/10.1039/c9nr08578e
chicago: Anahory, Y., H. R. Naren, E. O. Lachman, S. Buhbut Sinai, A. Uri, L. Embon,
E. Yaakobi, et al. “SQUID-on-Tip with Single-Electron Spin Sensitivity for High-Field
and Ultra-Low Temperature Nanomagnetic Imaging.” Nanoscale. Royal Society
of Chemistry, 2020. https://doi.org/10.1039/c9nr08578e.
ieee: Y. Anahory et al., “SQUID-on-tip with single-electron spin sensitivity
for high-field and ultra-low temperature nanomagnetic imaging,” Nanoscale,
vol. 12, no. 5. Royal Society of Chemistry, pp. 3174–3182, 2020.
ista: Anahory Y, Naren HR, Lachman EO, Buhbut Sinai S, Uri A, Embon L, Yaakobi E,
Myasoedov Y, Huber ME, Klajn R, Zeldov E. 2020. SQUID-on-tip with single-electron
spin sensitivity for high-field and ultra-low temperature nanomagnetic imaging.
Nanoscale. 12(5), 3174–3182.
mla: Anahory, Y., et al. “SQUID-on-Tip with Single-Electron Spin Sensitivity for
High-Field and Ultra-Low Temperature Nanomagnetic Imaging.” Nanoscale,
vol. 12, no. 5, Royal Society of Chemistry, 2020, pp. 3174–82, doi:10.1039/c9nr08578e.
short: Y. Anahory, H.R. Naren, E.O. Lachman, S. Buhbut Sinai, A. Uri, L. Embon,
E. Yaakobi, Y. Myasoedov, M.E. Huber, R. Klajn, E. Zeldov, Nanoscale 12 (2020)
3174–3182.
date_created: 2023-08-01T09:37:53Z
date_published: 2020-01-10T00:00:00Z
date_updated: 2023-08-07T10:32:15Z
day: '10'
doi: 10.1039/c9nr08578e
extern: '1'
external_id:
arxiv:
- '2001.03342'
pmid:
- '31967152'
intvolume: ' 12'
issue: '5'
keyword:
- General Materials Science
language:
- iso: eng
main_file_link:
- url: https://doi.org/10.48550/arXiv.2001.03342
month: '01'
oa_version: Preprint
page: 3174-3182
pmid: 1
publication: Nanoscale
publication_identifier:
eissn:
- 2040-3372
issn:
- 2040-3364
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: SQUID-on-tip with single-electron spin sensitivity for high-field and ultra-low
temperature nanomagnetic imaging
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 12
year: '2020'
...
---
_id: '13460'
abstract:
- lang: eng
text: Binary interaction can cause stellar envelopes to be stripped, which significantly
reduces the radius of the star. The orbit of a binary composed of a stripped star
and a compact object can therefore be so tight that the gravitational radiation
the system produces reaches frequencies accessible to the Laser Interferometer
Space Antenna (LISA). Two such stripped stars in tight orbits with white dwarfs
are known so far (ZTF J2130+4420 and CD−30°11223), but many more are expected
to exist. These binaries provide important constraints for binary evolution models
and may be used as LISA verification sources. We develop a Monte Carlo code that
uses detailed evolutionary models to simulate the Galactic population of stripped
stars in tight orbits with either neutron star or white dwarf companions. We predict
0–100 stripped star + white dwarf binaries and 0–4 stripped star + neutron star
binaries with a signal-to-noise ratio >5 after 10 yr of observations with LISA.
More than 90% of these binaries are expected to show large radial velocity shifts
of ≳200 $\,\mathrm{km}\,{{\rm{s}}}^{-1}$, which are spectroscopically detectable.
Photometric variability due to tidal deformation of the stripped star is also
expected and has been observed in ZTF J2130+4420 and CD−30°11223. In addition,
the stripped star + neutron star binaries are expected to be X-ray bright with
LX ≳ 1033–1036 $\,\mathrm{erg}\,{{\rm{s}}}^{-1}$. Our results show that stripped
star binaries are promising multimessenger sources for the upcoming electromagnetic
and gravitational wave facilities.
article_number: '56'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: V.
full_name: Korol, V.
last_name: Korol
- first_name: A.
full_name: Lamberts, A.
last_name: Lamberts
- first_name: T.
full_name: Kupfer, T.
last_name: Kupfer
- first_name: K.
full_name: Breivik, K.
last_name: Breivik
- first_name: B.
full_name: Ludwig, B.
last_name: Ludwig
- first_name: M. R.
full_name: Drout, M. R.
last_name: Drout
citation:
ama: 'Götberg YLL, Korol V, Lamberts A, et al. Stars stripped in binaries: The living
gravitational-wave sources. The Astrophysical Journal. 2020;904(1). doi:10.3847/1538-4357/abbda5'
apa: 'Götberg, Y. L. L., Korol, V., Lamberts, A., Kupfer, T., Breivik, K., Ludwig,
B., & Drout, M. R. (2020). Stars stripped in binaries: The living gravitational-wave
sources. The Astrophysical Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/abbda5'
chicago: 'Götberg, Ylva Louise Linsdotter, V. Korol, A. Lamberts, T. Kupfer, K.
Breivik, B. Ludwig, and M. R. Drout. “Stars Stripped in Binaries: The Living Gravitational-Wave
Sources.” The Astrophysical Journal. American Astronomical Society, 2020.
https://doi.org/10.3847/1538-4357/abbda5.'
ieee: 'Y. L. L. Götberg et al., “Stars stripped in binaries: The living gravitational-wave
sources,” The Astrophysical Journal, vol. 904, no. 1. American Astronomical
Society, 2020.'
ista: 'Götberg YLL, Korol V, Lamberts A, Kupfer T, Breivik K, Ludwig B, Drout MR.
2020. Stars stripped in binaries: The living gravitational-wave sources. The Astrophysical
Journal. 904(1), 56.'
mla: 'Götberg, Ylva Louise Linsdotter, et al. “Stars Stripped in Binaries: The Living
Gravitational-Wave Sources.” The Astrophysical Journal, vol. 904, no. 1,
56, American Astronomical Society, 2020, doi:10.3847/1538-4357/abbda5.'
short: Y.L.L. Götberg, V. Korol, A. Lamberts, T. Kupfer, K. Breivik, B. Ludwig,
M.R. Drout, The Astrophysical Journal 904 (2020).
date_created: 2023-08-03T10:12:07Z
date_published: 2020-11-20T00:00:00Z
date_updated: 2024-10-14T12:23:03Z
day: '20'
doi: 10.3847/1538-4357/abbda5
extern: '1'
external_id:
arxiv:
- '2006.07382'
intvolume: ' 904'
issue: '1'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.48550/arXiv.2006.07382
month: '11'
oa: 1
oa_version: Preprint
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Stars stripped in binaries: The living gravitational-wave sources'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 904
year: '2020'
...
---
_id: '13461'
abstract:
- lang: eng
text: High-resolution numerical simulations including feedback and aimed at calculating
the escape fraction (fesc) of hydrogen-ionizing photons often assume stellar radiation
based on single-stellar population synthesis models. However, strong evidence
suggests the binary fraction of massive stars is ≳70%. Moreover, simulations so
far have yielded values of fesc falling only on the lower end of the ∼10%–20%
range, the amount presumed necessary to reionize the universe. Analyzing a high-resolution
(4 pc) cosmological radiation-hydrodynamic simulation, we study how fesc changes
when we include two different products of binary stellar evolution—stars stripped
of their hydrogen envelopes and massive blue stragglers. Both produce significant
amounts of ionizing photons 10–200 Myr after each starburst. We find the relative
importance of these photons to be amplified with respect to escaped ionizing photons,
because peaks in star formation rates (SFRs) and fesc are often out of phase by
this 10–200 Myr. Additionally, low-mass, bursty galaxies emit Lyman continuum
radiation primarily from binary products when SFRs are low. Observations of these
galaxies by the James Webb Space Telescope could provide crucial information on
the evolution of binary stars as a function of redshift. Overall, including stripped
stars and massive blue stragglers increases our photon-weighted mean escape fraction
($\langle {f}_{\mathrm{esc}}\rangle $) by ∼13% and ∼10%, respectively, resulting
in $\langle {f}_{\mathrm{esc}}\rangle =17 \% $. Our results emphasize that using
updated stellar population synthesis models with binary stellar evolution provides
a more sound physical basis for stellar reionization.
article_number: '72'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Amy
full_name: Secunda, Amy
last_name: Secunda
- first_name: Renyue
full_name: Cen, Renyue
last_name: Cen
- first_name: Taysun
full_name: Kimm, Taysun
last_name: Kimm
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: Selma E.
full_name: de Mink, Selma E.
last_name: de Mink
citation:
ama: Secunda A, Cen R, Kimm T, Götberg YLL, de Mink SE. Delayed photons from binary
evolution help reionize the universe. The Astrophysical Journal. 2020;901(1).
doi:10.3847/1538-4357/abaefa
apa: Secunda, A., Cen, R., Kimm, T., Götberg, Y. L. L., & de Mink, S. E. (2020).
Delayed photons from binary evolution help reionize the universe. The Astrophysical
Journal. American Astronomical Society. https://doi.org/10.3847/1538-4357/abaefa
chicago: Secunda, Amy, Renyue Cen, Taysun Kimm, Ylva Louise Linsdotter Götberg,
and Selma E. de Mink. “Delayed Photons from Binary Evolution Help Reionize the
Universe.” The Astrophysical Journal. American Astronomical Society, 2020.
https://doi.org/10.3847/1538-4357/abaefa.
ieee: A. Secunda, R. Cen, T. Kimm, Y. L. L. Götberg, and S. E. de Mink, “Delayed
photons from binary evolution help reionize the universe,” The Astrophysical
Journal, vol. 901, no. 1. American Astronomical Society, 2020.
ista: Secunda A, Cen R, Kimm T, Götberg YLL, de Mink SE. 2020. Delayed photons from
binary evolution help reionize the universe. The Astrophysical Journal. 901(1),
72.
mla: Secunda, Amy, et al. “Delayed Photons from Binary Evolution Help Reionize the
Universe.” The Astrophysical Journal, vol. 901, no. 1, 72, American Astronomical
Society, 2020, doi:10.3847/1538-4357/abaefa.
short: A. Secunda, R. Cen, T. Kimm, Y.L.L. Götberg, S.E. de Mink, The Astrophysical
Journal 901 (2020).
date_created: 2023-08-03T10:12:16Z
date_published: 2020-09-23T00:00:00Z
date_updated: 2023-08-09T13:01:45Z
day: '23'
doi: 10.3847/1538-4357/abaefa
extern: '1'
external_id:
arxiv:
- '2007.15012'
intvolume: ' 901'
issue: '1'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3847/1538-4357/abaefa
month: '09'
oa: 1
oa_version: Published Version
publication: The Astrophysical Journal
publication_identifier:
eissn:
- 1538-4357
issn:
- 0004-637X
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Delayed photons from binary evolution help reionize the universe
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 901
year: '2020'
...
---
_id: '13463'
abstract:
- lang: eng
text: 'Present and upcoming time-domain astronomy efforts, in part driven by gravitational-wave
follow-up campaigns, will unveil a variety of rare explosive transients in the
sky. Here, we focus on pulsational pair-instability evolution, which can result
in signatures that are observable with electromagnetic and gravitational waves.
We simulated grids of bare helium stars to characterize the resulting black hole
(BH) masses together with the ejecta composition, velocity, and thermal state.
We find that the stars do not react “elastically” to the thermonuclear ignition
in the core: there is not a one-to-one correspondence between pair-instability
driven ignition and mass ejections, which causes ambiguity as to what is an observable
pulse. In agreement with previous studies, we find that for initial helium core
masses of 37.5 M⊙ ≲ MHe, init ≲ 41 M⊙, corresponding to carbon-oxygen core masses
27.5 M⊙ ≲ MCO ≲ 30.1 M⊙, the explosions are not strong enough to affect the surface.
With increasing initial helium core mass, they become progressively stronger causing
first large radial expansion (41 M⊙ ≲ MHe, init ≲ 42 M⊙, corresponding to 30.1 M⊙ ≲ MCO ≲ 30.8 M⊙)
and, finally, also mass ejection episodes (for MHe, init ≳ 42 M⊙, or MCO ≳ 30.8 M⊙).
The lowest mass helium core to be fully disrupted in a pair-instability supernova
is MHe, init ≃ 80 M⊙, corresponding to MCO ≃ 55 M⊙. Models with MHe, init ≳ 200 M⊙
(MCO ≳ 114 M⊙) reach the photodisintegration regime, resulting in BHs with masses
of MBH ≳ 125 M⊙. Although this is currently considered unlikely, if BHs from these
models form via (weak) explosions, the previously-ejected material might be hit
by the blast wave and convert kinetic energy into observable electromagnetic radiation.
We characterize the hydrogen-free circumstellar material from the pulsational
pair-instability of helium cores by simply assuming that the ejecta maintain a
constant velocity after ejection. We find that our models produce helium-rich
ejecta with mass of 10−3 M⊙ ≲ MCSM ≲ 40 M⊙, the larger values corresponding to
the more massive progenitor stars. These ejecta are typically launched at a few
thousand km s−1 and reach distances of ∼1012 − 1015 cm before the core-collapse
of the star. The delays between mass ejection events and the final collapse span
a wide and mass-dependent range (from subhour to 104 years), and the shells ejected
can also collide with each other, powering supernova impostor events before the
final core-collapse. The range of properties we find suggests a possible connection
with (some) type Ibn supernovae.'
article_number: A56
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: M.
full_name: Renzo, M.
last_name: Renzo
- first_name: R.
full_name: Farmer, R.
last_name: Farmer
- first_name: S.
full_name: Justham, S.
last_name: Justham
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: S. E.
full_name: de Mink, S. E.
last_name: de Mink
- first_name: E.
full_name: Zapartas, E.
last_name: Zapartas
- first_name: P.
full_name: Marchant, P.
last_name: Marchant
- first_name: N.
full_name: Smith, N.
last_name: Smith
citation:
ama: Renzo M, Farmer R, Justham S, et al. Predictions for the hydrogen-free ejecta
of pulsational pair-instability supernovae. Astronomy & Astrophysics.
2020;640. doi:10.1051/0004-6361/202037710
apa: Renzo, M., Farmer, R., Justham, S., Götberg, Y. L. L., de Mink, S. E., Zapartas,
E., … Smith, N. (2020). Predictions for the hydrogen-free ejecta of pulsational
pair-instability supernovae. Astronomy & Astrophysics. EDP Sciences.
https://doi.org/10.1051/0004-6361/202037710
chicago: Renzo, M., R. Farmer, S. Justham, Ylva Louise Linsdotter Götberg, S. E.
de Mink, E. Zapartas, P. Marchant, and N. Smith. “Predictions for the Hydrogen-Free
Ejecta of Pulsational Pair-Instability Supernovae.” Astronomy & Astrophysics.
EDP Sciences, 2020. https://doi.org/10.1051/0004-6361/202037710.
ieee: M. Renzo et al., “Predictions for the hydrogen-free ejecta of pulsational
pair-instability supernovae,” Astronomy & Astrophysics, vol. 640. EDP
Sciences, 2020.
ista: Renzo M, Farmer R, Justham S, Götberg YLL, de Mink SE, Zapartas E, Marchant
P, Smith N. 2020. Predictions for the hydrogen-free ejecta of pulsational pair-instability
supernovae. Astronomy & Astrophysics. 640, A56.
mla: Renzo, M., et al. “Predictions for the Hydrogen-Free Ejecta of Pulsational
Pair-Instability Supernovae.” Astronomy & Astrophysics, vol. 640, A56,
EDP Sciences, 2020, doi:10.1051/0004-6361/202037710.
short: M. Renzo, R. Farmer, S. Justham, Y.L.L. Götberg, S.E. de Mink, E. Zapartas,
P. Marchant, N. Smith, Astronomy & Astrophysics 640 (2020).
date_created: 2023-08-03T10:12:58Z
date_published: 2020-08-12T00:00:00Z
date_updated: 2023-08-09T12:58:41Z
day: '12'
doi: 10.1051/0004-6361/202037710
extern: '1'
external_id:
arxiv:
- '2002.05077'
intvolume: ' 640'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/202037710
month: '08'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Predictions for the hydrogen-free ejecta of pulsational pair-instability supernovae
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 640
year: '2020'
...
---
_id: '13464'
abstract:
- lang: eng
text: Massive binaries that merge as compact objects are the progenitors of gravitational-wave
sources. Most of these binaries experience one or more phases of mass transfer,
during which one of the stars loses all or part of its outer envelope and becomes
a stripped-envelope star. The evolution of the size of these stripped stars is
crucial in determining whether they experience further interactions and understanding
their ultimate fate. We present new calculations of stripped-envelope stars based
on binary evolution models computed with MESA. We use these to investigate their
radius evolution as a function of mass and metallicity. We further discuss their
pre-supernova observable characteristics and potential consequences of their evolution
on the properties of supernovae from stripped stars. At high metallicity, we find
that practically all of the hydrogen-rich envelope is removed, which is in agreement
with earlier findings. Only progenitors with initial masses below 10 M⊙ expand
to large radii (up to 100 R⊙), while more massive progenitors remain compact.
At low metallicity, a substantial amount of hydrogen remains and the progenitors
can, in principle, expand to giant sizes (> 400 R⊙) for all masses we consider.
This implies that they can fill their Roche lobe anew. We show that the prescriptions
commonly used in population synthesis models underestimate the stellar radii by
up to two orders of magnitude. We expect that this has consequences for the predictions
for gravitational-wave sources from double neutron star mergers, particularly
with regard to their metallicity dependence.
article_number: A6
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: E.
full_name: Laplace, E.
last_name: Laplace
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: S. E.
full_name: de Mink, S. E.
last_name: de Mink
- first_name: S.
full_name: Justham, S.
last_name: Justham
- first_name: R.
full_name: Farmer, R.
last_name: Farmer
citation:
ama: 'Laplace E, Götberg YLL, de Mink SE, Justham S, Farmer R. The expansion of
stripped-envelope stars: Consequences for supernovae and gravitational-wave progenitors.
Astronomy & Astrophysics. 2020;637. doi:10.1051/0004-6361/201937300'
apa: 'Laplace, E., Götberg, Y. L. L., de Mink, S. E., Justham, S., & Farmer,
R. (2020). The expansion of stripped-envelope stars: Consequences for supernovae
and gravitational-wave progenitors. Astronomy & Astrophysics. EDP Sciences.
https://doi.org/10.1051/0004-6361/201937300'
chicago: 'Laplace, E., Ylva Louise Linsdotter Götberg, S. E. de Mink, S. Justham,
and R. Farmer. “The Expansion of Stripped-Envelope Stars: Consequences for Supernovae
and Gravitational-Wave Progenitors.” Astronomy & Astrophysics. EDP
Sciences, 2020. https://doi.org/10.1051/0004-6361/201937300.'
ieee: 'E. Laplace, Y. L. L. Götberg, S. E. de Mink, S. Justham, and R. Farmer, “The
expansion of stripped-envelope stars: Consequences for supernovae and gravitational-wave
progenitors,” Astronomy & Astrophysics, vol. 637. EDP Sciences, 2020.'
ista: 'Laplace E, Götberg YLL, de Mink SE, Justham S, Farmer R. 2020. The expansion
of stripped-envelope stars: Consequences for supernovae and gravitational-wave
progenitors. Astronomy & Astrophysics. 637, A6.'
mla: 'Laplace, E., et al. “The Expansion of Stripped-Envelope Stars: Consequences
for Supernovae and Gravitational-Wave Progenitors.” Astronomy & Astrophysics,
vol. 637, A6, EDP Sciences, 2020, doi:10.1051/0004-6361/201937300.'
short: E. Laplace, Y.L.L. Götberg, S.E. de Mink, S. Justham, R. Farmer, Astronomy
& Astrophysics 637 (2020).
date_created: 2023-08-03T10:13:10Z
date_published: 2020-05-01T00:00:00Z
date_updated: 2023-08-09T12:56:32Z
day: '01'
doi: 10.1051/0004-6361/201937300
extern: '1'
external_id:
arxiv:
- '2003.01120'
intvolume: ' 637'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201937300
month: '05'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'The expansion of stripped-envelope stars: Consequences for supernovae and
gravitational-wave progenitors'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 637
year: '2020'
...
---
_id: '13465'
abstract:
- lang: eng
text: "Gravitational-wave detections are now probing the black hole (BH) mass distribution,
including the predicted pair-instability mass gap. These data require robust quantitative
predictions, which are challenging to obtain. The most massive BH progenitors
experience episodic mass ejections on time-scales shorter than the convective
turnover time-scale. This invalidates the steady-state assumption on which the
classic mixing length theory relies. We compare the final BH masses computed with
two different versions of the stellar evolutionary code MESA\r\n: (i) using the
default implementation of Paxton et al. (2018) and (ii) solving an additional
equation accounting for the time-scale for convective deceleration. In the second
grid, where stronger convection develops during the pulses and carries part of
the energy, we find weaker pulses. This leads to lower amounts of mass being ejected
and thus higher final BH masses of up to ∼5M⊙\r\n. The differences are much smaller
for the progenitors that determine the maximum mass of BHs below the gap. This
prediction is robust at MBH,max≃48M⊙\r\n, at least within the idealized context
of this study. This is an encouraging indication that current models are robust
enough for comparison with the present-day gravitational-wave detections. However,
the large differences between individual models emphasize the importance of improving
the treatment of convection in stellar models, especially in the light of the
data anticipated from the third generation of gravitational-wave detectors."
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: M
full_name: Renzo, M
last_name: Renzo
- first_name: R J
full_name: Farmer, R J
last_name: Farmer
- first_name: S
full_name: Justham, S
last_name: Justham
- first_name: S E
full_name: de Mink, S E
last_name: de Mink
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: P
full_name: Marchant, P
last_name: Marchant
citation:
ama: Renzo M, Farmer RJ, Justham S, de Mink SE, Götberg YLL, Marchant P. Sensitivity
of the lower edge of the pair-instability black hole mass gap to the treatment
of time-dependent convection. Monthly Notices of the Royal Astronomical Society.
2020;493(3):4333-4341. doi:10.1093/mnras/staa549
apa: Renzo, M., Farmer, R. J., Justham, S., de Mink, S. E., Götberg, Y. L. L., &
Marchant, P. (2020). Sensitivity of the lower edge of the pair-instability black
hole mass gap to the treatment of time-dependent convection. Monthly Notices
of the Royal Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/staa549
chicago: Renzo, M, R J Farmer, S Justham, S E de Mink, Ylva Louise Linsdotter Götberg,
and P Marchant. “Sensitivity of the Lower Edge of the Pair-Instability Black Hole
Mass Gap to the Treatment of Time-Dependent Convection.” Monthly Notices of
the Royal Astronomical Society. Oxford University Press, 2020. https://doi.org/10.1093/mnras/staa549.
ieee: M. Renzo, R. J. Farmer, S. Justham, S. E. de Mink, Y. L. L. Götberg, and P.
Marchant, “Sensitivity of the lower edge of the pair-instability black hole mass
gap to the treatment of time-dependent convection,” Monthly Notices of the
Royal Astronomical Society, vol. 493, no. 3. Oxford University Press, pp.
4333–4341, 2020.
ista: Renzo M, Farmer RJ, Justham S, de Mink SE, Götberg YLL, Marchant P. 2020.
Sensitivity of the lower edge of the pair-instability black hole mass gap to the
treatment of time-dependent convection. Monthly Notices of the Royal Astronomical
Society. 493(3), 4333–4341.
mla: Renzo, M., et al. “Sensitivity of the Lower Edge of the Pair-Instability Black
Hole Mass Gap to the Treatment of Time-Dependent Convection.” Monthly Notices
of the Royal Astronomical Society, vol. 493, no. 3, Oxford University Press,
2020, pp. 4333–41, doi:10.1093/mnras/staa549.
short: M. Renzo, R.J. Farmer, S. Justham, S.E. de Mink, Y.L.L. Götberg, P. Marchant,
Monthly Notices of the Royal Astronomical Society 493 (2020) 4333–4341.
date_created: 2023-08-03T10:13:20Z
date_published: 2020-04-04T00:00:00Z
date_updated: 2023-08-09T12:53:37Z
day: '04'
doi: 10.1093/mnras/staa549
extern: '1'
external_id:
arxiv:
- '2002.08200'
intvolume: ' 493'
issue: '3'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/staa549
month: '04'
oa: 1
oa_version: Published Version
page: 4333-4341
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
eissn:
- 1365-2966
issn:
- 0035-8711
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Sensitivity of the lower edge of the pair-instability black hole mass gap to
the treatment of time-dependent convection
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 493
year: '2020'
...
---
_id: '13466'
abstract:
- lang: eng
text: "Context. A majority of massive stars are part of binary systems, a large
fraction of which will inevitably interact during their lives. Binary-interaction
products (BiPs), that is, stars affected by such interaction, are expected to
be commonly present in stellar populations. BiPs are thus a crucial ingredient
in the understanding of stellar evolution.\r\nAims. We aim to identify and characterize
a statistically significant sample of BiPs by studying clusters of 10 − 40 Myr,
an age at which binary population models predict the abundance of BiPs to be highest.
One example of such a cluster is NGC 330 in the Small Magellanic Cloud.\r\nMethods.
Using MUSE WFM-AO observations of NGC 330, we resolved the dense cluster core
for the first time and were able to extract spectra of its entire massive star
population. We developed an automated spectral classification scheme based on
the equivalent widths of spectral lines in the red part of the spectrum.\r\nResults.
We characterize the massive star content of the core of NGC 330, which contains
more than 200 B stars, 2 O stars, 6 A-type supergiants, and 11 red supergiants.
We find a lower limit on the Be star fraction of 32 ± 3% in the whole sample.
It increases to at least 46 ± 10% when we only consider stars brighter than V = 17 mag.
We estimate an age of the cluster core between 35 and 40 Myr and a total cluster
mass of 88−18+17 × 103 M⊙.\r\nConclusions. We find that the population in the
cluster core is different than the population in the outskirts: while the stellar
content in the core appears to be older than the stars in the outskirts, the Be
star fraction and the observed binary fraction are significantly higher. Furthermore,
we detect several BiP candidates that will be subject of future studies."
article_number: A51
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: J.
full_name: Bodensteiner, J.
last_name: Bodensteiner
- first_name: H.
full_name: Sana, H.
last_name: Sana
- first_name: L.
full_name: Mahy, L.
last_name: Mahy
- first_name: L. R.
full_name: Patrick, L. R.
last_name: Patrick
- first_name: A.
full_name: de Koter, A.
last_name: de Koter
- first_name: S. E.
full_name: de Mink, S. E.
last_name: de Mink
- first_name: C. J.
full_name: Evans, C. J.
last_name: Evans
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: N.
full_name: Langer, N.
last_name: Langer
- first_name: D. J.
full_name: Lennon, D. J.
last_name: Lennon
- first_name: F. R. N.
full_name: Schneider, F. R. N.
last_name: Schneider
- first_name: F.
full_name: Tramper, F.
last_name: Tramper
citation:
ama: Bodensteiner J, Sana H, Mahy L, et al. The young massive SMC cluster NGC 330
seen by MUSE. Astronomy & Astrophysics. 2020;634. doi:10.1051/0004-6361/201936743
apa: Bodensteiner, J., Sana, H., Mahy, L., Patrick, L. R., de Koter, A., de Mink,
S. E., … Tramper, F. (2020). The young massive SMC cluster NGC 330 seen by MUSE.
Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201936743
chicago: Bodensteiner, J., H. Sana, L. Mahy, L. R. Patrick, A. de Koter, S. E. de
Mink, C. J. Evans, et al. “The Young Massive SMC Cluster NGC 330 Seen by MUSE.”
Astronomy & Astrophysics. EDP Sciences, 2020. https://doi.org/10.1051/0004-6361/201936743.
ieee: J. Bodensteiner et al., “The young massive SMC cluster NGC 330 seen
by MUSE,” Astronomy & Astrophysics, vol. 634. EDP Sciences, 2020.
ista: Bodensteiner J, Sana H, Mahy L, Patrick LR, de Koter A, de Mink SE, Evans
CJ, Götberg YLL, Langer N, Lennon DJ, Schneider FRN, Tramper F. 2020. The young
massive SMC cluster NGC 330 seen by MUSE. Astronomy & Astrophysics. 634, A51.
mla: Bodensteiner, J., et al. “The Young Massive SMC Cluster NGC 330 Seen by MUSE.”
Astronomy & Astrophysics, vol. 634, A51, EDP Sciences, 2020, doi:10.1051/0004-6361/201936743.
short: J. Bodensteiner, H. Sana, L. Mahy, L.R. Patrick, A. de Koter, S.E. de Mink,
C.J. Evans, Y.L.L. Götberg, N. Langer, D.J. Lennon, F.R.N. Schneider, F. Tramper,
Astronomy & Astrophysics 634 (2020).
date_created: 2023-08-03T10:13:29Z
date_published: 2020-02-05T00:00:00Z
date_updated: 2023-08-09T12:50:01Z
day: '05'
doi: 10.1051/0004-6361/201936743
extern: '1'
external_id:
arxiv:
- '1911.03477'
intvolume: ' 634'
keyword:
- 'stars: massive / stars: emission-line / Be / binaries: spectroscopic / blue stragglers
/ Magellanic Clouds'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201936743
month: '02'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: The young massive SMC cluster NGC 330 seen by MUSE
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 634
year: '2020'
...
---
_id: '13467'
abstract:
- lang: eng
text: Massive stars are often found in binary systems, and it has been argued that
binary products boost the ionizing radiation of stellar populations. Accurate
predictions for binary products are needed to understand and quantify their contribution
to cosmic reionization. We investigate the contribution of stars stripped in binaries
because (1) they are, arguably, the best-understood products of binary evolution,
(2) we recently produced the first radiative transfer calculations for the atmospheres
of these stripped stars that predict their ionizing spectra, and (3) they are
very promising sources because they boost the ionizing emission of stellar populations
at late times. This allows stellar feedback to clear the surroundings such that
a higher fraction of their photons can escape and ionize the intergalactic medium.
Combining our detailed predictions for the ionizing spectra with a simple cosmic
reionization model, we estimate that stripped stars contributed tens of percent
of the photons that caused cosmic reionization of hydrogen, depending on the assumed
escape fractions. More importantly, stripped stars harden the ionizing emission.
We estimate that the spectral index for the ionizing part of the spectrum can
increase to −1 compared to ≲ − 2 for single stars. At high redshift, stripped
stars and massive single stars combined dominate the He II-ionizing emission,
but we expect that active galactic nuclei drive cosmic helium reionization. Further
observational consequences we expect are (1) high ionization states for the intergalactic
gas surrounding stellar systems, such as C IV and Si IV, and (2) additional heating
of the intergalactic medium of up to a few thousand Kelvin. Quantifying these
warrants the inclusion of accurate models for stripped stars and other binary
products in full cosmological simulations.
article_number: A134
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: S. E.
full_name: de Mink, S. E.
last_name: de Mink
- first_name: M.
full_name: McQuinn, M.
last_name: McQuinn
- first_name: E.
full_name: Zapartas, E.
last_name: Zapartas
- first_name: J. H.
full_name: Groh, J. H.
last_name: Groh
- first_name: C.
full_name: Norman, C.
last_name: Norman
citation:
ama: Götberg YLL, de Mink SE, McQuinn M, Zapartas E, Groh JH, Norman C. Contribution
from stars stripped in binaries to cosmic reionization of hydrogen and helium.
Astronomy & Astrophysics. 2020;634. doi:10.1051/0004-6361/201936669
apa: Götberg, Y. L. L., de Mink, S. E., McQuinn, M., Zapartas, E., Groh, J. H.,
& Norman, C. (2020). Contribution from stars stripped in binaries to cosmic
reionization of hydrogen and helium. Astronomy & Astrophysics. EDP
Sciences. https://doi.org/10.1051/0004-6361/201936669
chicago: Götberg, Ylva Louise Linsdotter, S. E. de Mink, M. McQuinn, E. Zapartas,
J. H. Groh, and C. Norman. “Contribution from Stars Stripped in Binaries to Cosmic
Reionization of Hydrogen and Helium.” Astronomy & Astrophysics. EDP
Sciences, 2020. https://doi.org/10.1051/0004-6361/201936669.
ieee: Y. L. L. Götberg, S. E. de Mink, M. McQuinn, E. Zapartas, J. H. Groh, and
C. Norman, “Contribution from stars stripped in binaries to cosmic reionization
of hydrogen and helium,” Astronomy & Astrophysics, vol. 634. EDP Sciences,
2020.
ista: Götberg YLL, de Mink SE, McQuinn M, Zapartas E, Groh JH, Norman C. 2020. Contribution
from stars stripped in binaries to cosmic reionization of hydrogen and helium.
Astronomy & Astrophysics. 634, A134.
mla: Götberg, Ylva Louise Linsdotter, et al. “Contribution from Stars Stripped in
Binaries to Cosmic Reionization of Hydrogen and Helium.” Astronomy & Astrophysics,
vol. 634, A134, EDP Sciences, 2020, doi:10.1051/0004-6361/201936669.
short: Y.L.L. Götberg, S.E. de Mink, M. McQuinn, E. Zapartas, J.H. Groh, C. Norman,
Astronomy & Astrophysics 634 (2020).
date_created: 2023-08-03T10:13:43Z
date_published: 2020-02-25T00:00:00Z
date_updated: 2024-10-14T12:22:53Z
day: '25'
doi: 10.1051/0004-6361/201936669
extern: '1'
external_id:
arxiv:
- '1911.00543'
intvolume: ' 634'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201936669
month: '02'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Contribution from stars stripped in binaries to cosmic reionization of hydrogen
and helium
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 634
year: '2020'
...
---
_id: '13998'
abstract:
- lang: eng
text: The interaction of strong near-infrared (NIR) laser pulses with wide-bandgap
dielectrics produces high harmonics in the extreme ultraviolet (XUV) wavelength
range. These observations have opened up the possibility of attosecond metrology
in solids, which would benefit from a precise measurement of the emission times
of individual harmonics with respect to the NIR laser field. Here we show that,
when high-harmonics are detected from the input surface of a magnesium oxide crystal,
a bichromatic probing of the XUV emission shows a clear synchronization largely
consistent with a semiclassical model of electron–hole recollisions in bulk solids.
On the other hand, the bichromatic spectrogram of harmonics originating from the
exit surface of the 200 μm-thick crystal is strongly modified, indicating the
influence of laser field distortions during propagation. Our tracking of sub-cycle
electron and hole re-collisions at XUV energies is relevant to the development
of solid-state sources of attosecond pulses.
article_number: '144003'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Giulio
full_name: Vampa, Giulio
last_name: Vampa
- first_name: Jian
full_name: Lu, Jian
last_name: Lu
- first_name: Yong Sing
full_name: You, Yong Sing
last_name: You
- first_name: Denitsa Rangelova
full_name: Baykusheva, Denitsa Rangelova
id: 71b4d059-2a03-11ee-914d-dfa3beed6530
last_name: Baykusheva
- first_name: Mengxi
full_name: Wu, Mengxi
last_name: Wu
- first_name: Hanzhe
full_name: Liu, Hanzhe
last_name: Liu
- first_name: Kenneth J
full_name: Schafer, Kenneth J
last_name: Schafer
- first_name: Mette B
full_name: Gaarde, Mette B
last_name: Gaarde
- first_name: David A
full_name: Reis, David A
last_name: Reis
- first_name: Shambhu
full_name: Ghimire, Shambhu
last_name: Ghimire
citation:
ama: 'Vampa G, Lu J, You YS, et al. Attosecond synchronization of extreme ultraviolet
high harmonics from crystals. Journal of Physics B: Atomic, Molecular and Optical
Physics. 2020;53(14). doi:10.1088/1361-6455/ab8e56'
apa: 'Vampa, G., Lu, J., You, Y. S., Baykusheva, D. R., Wu, M., Liu, H., … Ghimire,
S. (2020). Attosecond synchronization of extreme ultraviolet high harmonics from
crystals. Journal of Physics B: Atomic, Molecular and Optical Physics.
IOP Publishing. https://doi.org/10.1088/1361-6455/ab8e56'
chicago: 'Vampa, Giulio, Jian Lu, Yong Sing You, Denitsa Rangelova Baykusheva, Mengxi
Wu, Hanzhe Liu, Kenneth J Schafer, Mette B Gaarde, David A Reis, and Shambhu Ghimire.
“Attosecond Synchronization of Extreme Ultraviolet High Harmonics from Crystals.”
Journal of Physics B: Atomic, Molecular and Optical Physics. IOP Publishing,
2020. https://doi.org/10.1088/1361-6455/ab8e56.'
ieee: 'G. Vampa et al., “Attosecond synchronization of extreme ultraviolet
high harmonics from crystals,” Journal of Physics B: Atomic, Molecular and
Optical Physics, vol. 53, no. 14. IOP Publishing, 2020.'
ista: 'Vampa G, Lu J, You YS, Baykusheva DR, Wu M, Liu H, Schafer KJ, Gaarde MB,
Reis DA, Ghimire S. 2020. Attosecond synchronization of extreme ultraviolet high
harmonics from crystals. Journal of Physics B: Atomic, Molecular and Optical Physics.
53(14), 144003.'
mla: 'Vampa, Giulio, et al. “Attosecond Synchronization of Extreme Ultraviolet High
Harmonics from Crystals.” Journal of Physics B: Atomic, Molecular and Optical
Physics, vol. 53, no. 14, 144003, IOP Publishing, 2020, doi:10.1088/1361-6455/ab8e56.'
short: 'G. Vampa, J. Lu, Y.S. You, D.R. Baykusheva, M. Wu, H. Liu, K.J. Schafer,
M.B. Gaarde, D.A. Reis, S. Ghimire, Journal of Physics B: Atomic, Molecular and
Optical Physics 53 (2020).'
date_created: 2023-08-09T13:09:51Z
date_published: 2020-06-17T00:00:00Z
date_updated: 2023-08-22T07:36:36Z
day: '17'
doi: 10.1088/1361-6455/ab8e56
extern: '1'
external_id:
arxiv:
- '2001.09951'
intvolume: ' 53'
issue: '14'
keyword:
- Condensed Matter Physics
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2001.09951
month: '06'
oa: 1
oa_version: Preprint
publication: 'Journal of Physics B: Atomic, Molecular and Optical Physics'
publication_identifier:
eissn:
- 1361-6455
issn:
- 0953-4075
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Attosecond synchronization of extreme ultraviolet high harmonics from crystals
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 53
year: '2020'
...
---
_id: '13999'
abstract:
- lang: eng
text: Attosecond chronoscopy has revealed small but measurable delays in photoionization,
characterized by the ejection of an electron on absorption of a single photon.
Ionization-delay measurements in atomic targets provide a wealth of information
about the timing of the photoelectric effect, resonances, electron correlations
and transport. However, extending this approach to molecules presents challenges,
such as identifying the correct ionization channels and the effect of the anisotropic
molecular landscape on the measured delays. Here, we measure ionization delays
from ethyl iodide around a giant dipole resonance. By using the theoretical value
for the iodine atom as a reference, we disentangle the contribution from the functional
ethyl group, which is responsible for the characteristic chemical reactivity of
a molecule. We find a substantial additional delay caused by the presence of a
functional group, which encodes the effect of the molecular potential on the departing
electron. Such information is inaccessible to the conventional approach of measuring
photoionization cross-sections. The results establish ionization-delay measurements
as a valuable tool in investigating the electronic properties of molecules.
article_processing_charge: No
article_type: original
author:
- first_name: Shubhadeep
full_name: Biswas, Shubhadeep
last_name: Biswas
- first_name: Benjamin
full_name: Förg, Benjamin
last_name: Förg
- first_name: Lisa
full_name: Ortmann, Lisa
last_name: Ortmann
- first_name: Johannes
full_name: Schötz, Johannes
last_name: Schötz
- first_name: Wolfgang
full_name: Schweinberger, Wolfgang
last_name: Schweinberger
- first_name: Tomáš
full_name: Zimmermann, Tomáš
last_name: Zimmermann
- first_name: Liangwen
full_name: Pi, Liangwen
last_name: Pi
- first_name: Denitsa Rangelova
full_name: Baykusheva, Denitsa Rangelova
id: 71b4d059-2a03-11ee-914d-dfa3beed6530
last_name: Baykusheva
- first_name: Hafiz A.
full_name: Masood, Hafiz A.
last_name: Masood
- first_name: Ioannis
full_name: Liontos, Ioannis
last_name: Liontos
- first_name: Amgad M.
full_name: Kamal, Amgad M.
last_name: Kamal
- first_name: Nora G.
full_name: Kling, Nora G.
last_name: Kling
- first_name: Abdullah F.
full_name: Alharbi, Abdullah F.
last_name: Alharbi
- first_name: Meshaal
full_name: Alharbi, Meshaal
last_name: Alharbi
- first_name: Abdallah M.
full_name: Azzeer, Abdallah M.
last_name: Azzeer
- first_name: Gregor
full_name: Hartmann, Gregor
last_name: Hartmann
- first_name: Hans J.
full_name: Wörner, Hans J.
last_name: Wörner
- first_name: Alexandra S.
full_name: Landsman, Alexandra S.
last_name: Landsman
- first_name: Matthias F.
full_name: Kling, Matthias F.
last_name: Kling
citation:
ama: Biswas S, Förg B, Ortmann L, et al. Probing molecular environment through photoemission
delays. Nature Physics. 2020;16(7):778-783. doi:10.1038/s41567-020-0887-8
apa: Biswas, S., Förg, B., Ortmann, L., Schötz, J., Schweinberger, W., Zimmermann,
T., … Kling, M. F. (2020). Probing molecular environment through photoemission
delays. Nature Physics. Springer Nature. https://doi.org/10.1038/s41567-020-0887-8
chicago: Biswas, Shubhadeep, Benjamin Förg, Lisa Ortmann, Johannes Schötz, Wolfgang
Schweinberger, Tomáš Zimmermann, Liangwen Pi, et al. “Probing Molecular Environment
through Photoemission Delays.” Nature Physics. Springer Nature, 2020. https://doi.org/10.1038/s41567-020-0887-8.
ieee: S. Biswas et al., “Probing molecular environment through photoemission
delays,” Nature Physics, vol. 16, no. 7. Springer Nature, pp. 778–783,
2020.
ista: Biswas S, Förg B, Ortmann L, Schötz J, Schweinberger W, Zimmermann T, Pi L,
Baykusheva DR, Masood HA, Liontos I, Kamal AM, Kling NG, Alharbi AF, Alharbi M,
Azzeer AM, Hartmann G, Wörner HJ, Landsman AS, Kling MF. 2020. Probing molecular
environment through photoemission delays. Nature Physics. 16(7), 778–783.
mla: Biswas, Shubhadeep, et al. “Probing Molecular Environment through Photoemission
Delays.” Nature Physics, vol. 16, no. 7, Springer Nature, 2020, pp. 778–83,
doi:10.1038/s41567-020-0887-8.
short: S. Biswas, B. Förg, L. Ortmann, J. Schötz, W. Schweinberger, T. Zimmermann,
L. Pi, D.R. Baykusheva, H.A. Masood, I. Liontos, A.M. Kamal, N.G. Kling, A.F.
Alharbi, M. Alharbi, A.M. Azzeer, G. Hartmann, H.J. Wörner, A.S. Landsman, M.F.
Kling, Nature Physics 16 (2020) 778–783.
date_created: 2023-08-09T13:10:07Z
date_published: 2020-07-01T00:00:00Z
date_updated: 2023-08-22T07:38:04Z
day: '01'
doi: 10.1038/s41567-020-0887-8
extern: '1'
intvolume: ' 16'
issue: '7'
keyword:
- General Physics and Astronomy
language:
- iso: eng
month: '07'
oa_version: None
page: 778-783
publication: Nature Physics
publication_identifier:
eissn:
- 1745-2481
issn:
- 1745-2473
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Probing molecular environment through photoemission delays
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2020'
...