---
OA_place: publisher
OA_type: free access
_id: '21821'
abstract:
- lang: eng
  text: "Molecular photoswitches provide a means for imparting synthetic structures
    with intrinsically logical and highly\r\ntunable photoresponsive properties. One
    variety of organic photoswitches known as Donor-Acceptor Stenhouse\r\nAdducts,
    or DASAs, are promising candidates for next generation light responsive materials
    because of their\r\nunique ability to stabilize three photochemically distinct
    isomeric states in solution, while their counterparts are\r\nstrictly limited
    to binary state behavior. In this work, we show how polymethacrylate host matrices
    shift the\r\nenergetic landscape of DASA relative to solution, prohibiting accumulation
    of an intermediate third isomeric\r\nstate by decelerating critical steps in the
    photoswitching mechanism. Specifically, we employ a dual-wavelength,\r\nphase
    locked detection scheme to probe thermal isomerizations in the switching process
    that occur at fast (~ms)\r\ntime scales that are inaccessible by standard UV–Vis
    spectroscopic techniques. The results of this study provide\r\nvaluable insight
    into the mechanism of multistate DASA reactivity and establish the foundation
    necessary to\r\nguide future efforts in offsetting kinetic matrix effects to enable
    dynamic, three state photoswitching in polymeric\r\nhosts. "
article_number: '114964'
article_processing_charge: No
article_type: original
author:
- first_name: Sara
  full_name: Sandlass, Sara
  last_name: Sandlass
- first_name: Friedrich J
  full_name: Stricker, Friedrich J
  id: 7aca2cfc-46cf-11f0-abd3-8c96b5186745
  last_name: Stricker
- first_name: Daniel
  full_name: Fragoso, Daniel
  last_name: Fragoso
- first_name: Javier Read
  full_name: de Alaniz, Javier Read
  last_name: de Alaniz
- first_name: Michael J.
  full_name: Gordon, Michael J.
  last_name: Gordon
citation:
  ama: 'Sandlass S, Stricker FJ, Fragoso D, de Alaniz JR, Gordon MJ. Effect of polymer
    host matrix on multi-stage isomerization kinetics of DASA photochromes. <i>Journal
    of Photochemistry and Photobiology A: Chemistry</i>. 2023;444. doi:<a href="https://doi.org/10.1016/j.jphotochem.2023.114964">10.1016/j.jphotochem.2023.114964</a>'
  apa: 'Sandlass, S., Stricker, F. J., Fragoso, D., de Alaniz, J. R., &#38; Gordon,
    M. J. (2023). Effect of polymer host matrix on multi-stage isomerization kinetics
    of DASA photochromes. <i>Journal of Photochemistry and Photobiology A: Chemistry</i>.
    Elsevier. <a href="https://doi.org/10.1016/j.jphotochem.2023.114964">https://doi.org/10.1016/j.jphotochem.2023.114964</a>'
  chicago: 'Sandlass, Sara, Friedrich J Stricker, Daniel Fragoso, Javier Read de Alaniz,
    and Michael J. Gordon. “Effect of Polymer Host Matrix on Multi-Stage Isomerization
    Kinetics of DASA Photochromes.” <i>Journal of Photochemistry and Photobiology
    A: Chemistry</i>. Elsevier, 2023. <a href="https://doi.org/10.1016/j.jphotochem.2023.114964">https://doi.org/10.1016/j.jphotochem.2023.114964</a>.'
  ieee: 'S. Sandlass, F. J. Stricker, D. Fragoso, J. R. de Alaniz, and M. J. Gordon,
    “Effect of polymer host matrix on multi-stage isomerization kinetics of DASA photochromes,”
    <i>Journal of Photochemistry and Photobiology A: Chemistry</i>, vol. 444. Elsevier,
    2023.'
  ista: 'Sandlass S, Stricker FJ, Fragoso D, de Alaniz JR, Gordon MJ. 2023. Effect
    of polymer host matrix on multi-stage isomerization kinetics of DASA photochromes.
    Journal of Photochemistry and Photobiology A: Chemistry. 444, 114964.'
  mla: 'Sandlass, Sara, et al. “Effect of Polymer Host Matrix on Multi-Stage Isomerization
    Kinetics of DASA Photochromes.” <i>Journal of Photochemistry and Photobiology
    A: Chemistry</i>, vol. 444, 114964, Elsevier, 2023, doi:<a href="https://doi.org/10.1016/j.jphotochem.2023.114964">10.1016/j.jphotochem.2023.114964</a>.'
  short: 'S. Sandlass, F.J. Stricker, D. Fragoso, J.R. de Alaniz, M.J. Gordon, Journal
    of Photochemistry and Photobiology A: Chemistry 444 (2023).'
date_created: 2026-05-06T10:57:28Z
date_published: 2023-10-01T00:00:00Z
date_updated: 2026-05-18T09:19:40Z
day: '01'
ddc:
- '540'
doi: 10.1016/j.jphotochem.2023.114964
extern: '1'
intvolume: '       444'
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1016/j.jphotochem.2023.114964
month: '10'
oa: 1
oa_version: Published Version
publication: 'Journal of Photochemistry and Photobiology A: Chemistry'
publication_identifier:
  eissn:
  - 1873-2666
  issn:
  - 1010-6030
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Effect of polymer host matrix on multi-stage isomerization kinetics of DASA
  photochromes
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 444
year: '2023'
...