Photochromism of Spiropyran Nanocrystals Embedded in Sol−Gel Matrices
| العنوان: | Photochromism of Spiropyran Nanocrystals Embedded in Sol−Gel Matrices |
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| المؤلفون: | Sylvie Spagnoli, and Alain Ibanez, Estelle Botzung-Appert, Dominique Block, A. Corval, Patrice L. Baldeck, Isabelle Colombier |
| المصدر: | The Journal of Physical Chemistry B. 109:8587-8591 |
| بيانات النشر: | American Chemical Society (ACS), 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Spiropyran, chemistry.chemical_classification, Materials science, Iodide, Crystal structure, Photochemistry, Evaporation (deposition), Surfaces, Coatings and Films, Photochromism, chemistry.chemical_compound, Nanocrystal, chemistry, Materials Chemistry, Pyridinium, Physical and Theoretical Chemistry, Sol-gel |
| الوصف: | Spectroscopic and kinetic properties of a new photochromic medium, consisting of nanocrystals of spyropyran molecules (1,3-dihydro-1,3,3,5',6',pentamethyl-spiro[2H-indole-2,2'-[2H]pyrano [3,2-b]pyridinium] iodide) embedded in an organo-silicate sol-gel film, are presented and compared to microcrystals obtained by slow evaporation of a solvent. High photoconversion efficiencies for both kinds of crystals have been observed. In microcrystals, the photomerocyanine form absorbs at 570 nm with a fading rate of 5 h, in nanocrystals the photomerocyanine form absorbs at 535 nm with a fading rate of 41 h. Therefore, the crystalline structure of nanocrystals is different from the microcrystal one. |
| تدمد: | 1520-5207 1520-6106 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d1df9117a1c31388e8e08cd93f082c3 https://doi.org/10.1021/jp046792r |
| رقم الأكسشن: | edsair.doi.dedup.....8d1df9117a1c31388e8e08cd93f082c3 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205207 15206106 |
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