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A Study of Photoprocesses of 3,3'-Diethyl-5,5'-Dichlorothiacarbocyanine in Water and Methanolстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 7 июля 2020 г.
- Авторы: Fedotova T.V., Zakharova G.V., Gutrov V.N., Markelov V.P., Svyatoslavskaya T.A., Svyatoslavskii N.L., Chibisov A.K., Sazonov S.K., Gromov S.P.
- Журнал: High Energy Chemistry
- Том: 54
- Номер: 3
- Год издания: 2020
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 170
- Последняя страница: 174
- DOI: 10.1134/S0018143920030042
- Аннотация: Photoprocesses in 3,3'-diethyl-5,5'-dichlorothiacarbocyanine have been studied in the cases of direct and sensitized photoexcitation in methanol and water in the absence and in the presence of cucurbit[7]uril. Under laser pulse excitation, trans–cis isomerization occurring via the excited singlet state of the dye (S*) takes place preferentially. The population of the dye triplet T state increases in the sensitized excitation as a result of triplet–triplet energy transfer from a triplet energy donor (anthracene and anthracenecarboxylic acid) to the dye (acceptor). Deactivation of the molecules in the T state occurs via electron transfer and back Т→S* intersystem crossing. The S* state formed in the Т→S* process decays via both conventional and delayed fluorescence. The presence of cucurbit[7]uril in the dye aqueous solution does not affect the mechanism of the photoprocesses in the dye, but it facilitates dimerization and increase in the yield into the T state, mainly of the dimers, and increases the lifetime of the dye cis-isomers.
- Добавил в систему: Громов Сергей Пантелеймонович