[{"publication_status":"published","author":[{"full_name":"Sandlass, Sara","first_name":"Sara","last_name":"Sandlass"},{"last_name":"Stricker","full_name":"Stricker, Friedrich J","id":"7aca2cfc-46cf-11f0-abd3-8c96b5186745","first_name":"Friedrich J"},{"last_name":"Fragoso","first_name":"Daniel","full_name":"Fragoso, Daniel"},{"last_name":"de Alaniz","full_name":"de Alaniz, Javier Read","first_name":"Javier Read"},{"full_name":"Gordon, Michael J.","first_name":"Michael J.","last_name":"Gordon"}],"type":"journal_article","extern":"1","article_number":"114964","OA_place":"publisher","article_processing_charge":"No","quality_controlled":"1","status":"public","doi":"10.1016/j.jphotochem.2023.114964","intvolume":"       444","publisher":"Elsevier","citation":{"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>.","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.","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.","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>.","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>","short":"S. Sandlass, F.J. Stricker, D. Fragoso, J.R. de Alaniz, M.J. Gordon, Journal of Photochemistry and Photobiology A: Chemistry 444 (2023).","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>"},"volume":444,"_id":"21821","oa":1,"oa_version":"Published Version","date_published":"2023-10-01T00:00:00Z","month":"10","ddc":["540"],"publication":"Journal of Photochemistry and Photobiology A: Chemistry","date_updated":"2026-05-18T09:19:40Z","date_created":"2026-05-06T10:57:28Z","title":"Effect of polymer host matrix on multi-stage isomerization kinetics of DASA photochromes","day":"01","scopus_import":"1","article_type":"original","year":"2023","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1016/j.jphotochem.2023.114964"}],"OA_type":"free access","abstract":[{"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. ","lang":"eng"}],"publication_identifier":{"eissn":["1873-2666"],"issn":["1010-6030"]},"language":[{"iso":"eng"}]},{"intvolume":"       149","user_id":"ea97e931-d5af-11eb-85d4-e6957dddbf17","doi":"10.1016/S1010-6030(02)00027-8","year":"2002","day":"28","acknowledgement":"Financial support from NCSR “Demokritos” (Dimoerevna 598 project), Empeirikeion Foundation and General Secretariat for Research and Technology of Greece (EPET II, Greece–France and Greece–Czech Republic bilateral collaboration projects) is also greatly acknowledged. G. Katsaros thanks the Greek State Scholarships Foundation (IKY) for fellowship allowance","title":"A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells","issue":"1-3","status":"public","article_processing_charge":"No","date_created":"2018-12-11T11:53:44Z","date_updated":"2023-07-26T08:56:55Z","publication":"Journal of Photochemistry and Photobiology A: Chemistry","page":"191 - 198","extern":"1","type":"journal_article","month":"06","publication_status":"published","author":[{"last_name":"Katsaros","full_name":"Katsaros, Georgios","first_name":"Georgios","id":"38DB5788-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Stergiopoulos","first_name":"Thomas","full_name":"Stergiopoulos, Thomas"},{"full_name":"Arabatzis, Iannis","first_name":"Iannis","last_name":"Arabatzis"},{"full_name":"Papadokostaki, Kyriaki","first_name":"Kyriaki","last_name":"Papadokostaki"},{"last_name":"Falaras","full_name":"Falaras, Polycarpos","first_name":"Polycarpos"}],"date_published":"2002-06-28T00:00:00Z","oa_version":"None","_id":"1737","publist_id":"5387","volume":149,"citation":{"chicago":"Katsaros, Georgios, Thomas Stergiopoulos, Iannis Arabatzis, Kyriaki Papadokostaki, and Polycarpos Falaras. “A Solvent-Free Composite Polymer/Inorganic Oxide Electrolyte for High Efficiency Solid-State Dye-Sensitized Solar Cells.” <i>Journal of Photochemistry and Photobiology A: Chemistry</i>. Elsevier, 2002. <a href=\"https://doi.org/10.1016/S1010-6030(02)00027-8\">https://doi.org/10.1016/S1010-6030(02)00027-8</a>.","ama":"Katsaros G, Stergiopoulos T, Arabatzis I, Papadokostaki K, Falaras P. A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells. <i>Journal of Photochemistry and Photobiology A: Chemistry</i>. 2002;149(1-3):191-198. doi:<a href=\"https://doi.org/10.1016/S1010-6030(02)00027-8\">10.1016/S1010-6030(02)00027-8</a>","apa":"Katsaros, G., Stergiopoulos, T., Arabatzis, I., Papadokostaki, K., &#38; Falaras, P. (2002). A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells. <i>Journal of Photochemistry and Photobiology A: Chemistry</i>. Elsevier. <a href=\"https://doi.org/10.1016/S1010-6030(02)00027-8\">https://doi.org/10.1016/S1010-6030(02)00027-8</a>","short":"G. Katsaros, T. Stergiopoulos, I. Arabatzis, K. Papadokostaki, P. Falaras, Journal of Photochemistry and Photobiology A: Chemistry 149 (2002) 191–198.","mla":"Katsaros, Georgios, et al. “A Solvent-Free Composite Polymer/Inorganic Oxide Electrolyte for High Efficiency Solid-State Dye-Sensitized Solar Cells.” <i>Journal of Photochemistry and Photobiology A: Chemistry</i>, vol. 149, no. 1–3, Elsevier, 2002, pp. 191–98, doi:<a href=\"https://doi.org/10.1016/S1010-6030(02)00027-8\">10.1016/S1010-6030(02)00027-8</a>.","ista":"Katsaros G, Stergiopoulos T, Arabatzis I, Papadokostaki K, Falaras P. 2002. A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells. Journal of Photochemistry and Photobiology A: Chemistry. 149(1–3), 191–198.","ieee":"G. Katsaros, T. Stergiopoulos, I. Arabatzis, K. Papadokostaki, and P. Falaras, “A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells,” <i>Journal of Photochemistry and Photobiology A: Chemistry</i>, vol. 149, no. 1–3. Elsevier, pp. 191–198, 2002."},"language":[{"iso":"eng"}],"abstract":[{"text":"A new solvent-free composite polymer electrolyte consisting of high-molecular mass polyethylene oxide (PEO) filled with titanium oxide and containing LiI and I2 was developed. The introduction of the inorganic filler (TiO2 Degussa P25) into the polymer matrix produces dramatic morphological changes to the host polymer structure. Upon addition of the inorganic oxide, the surface roughness increases, with respect to the original polymer and in parallel, the fractal dimension decreases. Both the thermograms and the atomic force microscope (AFM) pictures confirm the amorphicity of the composite electrolyte. The polymer sub-units are held together in a parallel orientation, forming straight long chains of about 500 nm in width, along which TiO2 spherical particles of about 20-25 nm in diameter are distributed. The polymer chains separated by the titania particles are arranged in a three-dimensional, mechanically stable network, that creates free space and voids into which the iodide/triodide anions can easily migrate. All solid-state dye-sensitized solar cells fabricated using this composite electrolyte present high efficiencies (typical maximum incident photon to current efficiency (IPCE) as high as 40% at 520 nm and overall conversion efficiency (η) of 0.96% (Voc = 0.67 V, Jsc = 2.050 mA/cm2, FF = 39%) under direct solar irradiation. Further improvement of the photovoltaic performance is expected by optimization of the electrolyte parameters and of the cell assembly.","lang":"eng"}],"publication_identifier":{"issn":["1010-6030"]},"publisher":"Elsevier"}]