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Crown-containing spironaphthoxazines and spiropyrans. 2. Influence of metal cations on the photochromic properties of spironaphthoxazines linked with aza-15(18)-crown-5(6) ethersстатья
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: 18 июля 2013 г.
- Авторы: Strokach Y.P., Fedorova O.A., Gromov S.P., Koshkin A.V., Valova T.M., Barachevsky V.A., Alfimov M.V., Lokshin V.A., Samat A., Guglielmetti R.
- Журнал: Russian Chemical Bulletin
- Том: 51
- Номер: 1
- Год издания: 2002
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 58
- Последняя страница: 66
- DOI: 10.1023/A:1015001527963
- Аннотация: Spironaphthoxazines linked with aza-15(18)-crown-5(6) fragments were synthesized and studied for the first time. Addition of alkaline-earth cations to solutions of crown-containing spironaphthoxazines causes a hypsochromic shift of the absorption hand of I lie spiro form and a bathochromic shift oft tie absorption band of the merocyanine form, shifts the equilibrium to the merocyanine form, and changes the lifetime of the photoexcited merocyanine form. The spectral and kinetic data were Used to propose a mechanism of complexation and calculate the stability constants of the resulting complexes. The complexation involves the crown fragment and the merocyanine oxygen atom. The type of the complex is determined by the cation nature and size.
- Добавил в систему: Громов Сергей Пантелеймонович