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Effect of a polymer matrix on the complexation and photochemical behavior of an azacrown-containing styryl dyeстатья
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: Nasimova I.R., Ushakov E.N., Makhaeva E.E., Fedorova O.A., Gromov S.P., Alfimov M.V., Khokhlov A.R.
- Журнал: Polymer Science, Series A
- Том: 44
- Номер: 12
- Год издания: 2002
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 1313
- Последняя страница: 1318
- Аннотация: The effect of the polymer matrix of neutral poly(N-vinylcaprolactam) gels on the complexation and photochemical behavior of a styryl dye containing the N-phenylaza-18-crown-6 moiety was studied. The electronic absorption spectra of the dye immobilized in the polymer matrix and its solution in acetonitrile were found to differ only slightly. Polymer matrix subchains are conformationally insensitive to immobilization of the dye. The addition of barium perchlorate to the polymer-dye-acetonitrile system results in strong swelling of the polymer gel. The polymer network impedes the complexation between the crown ether moiety of the dye and the barium cation because of possible interactions of Ba2+ with one or more C=O groups of poly(N-vinylcaprolactam). A high degree of transformation of the immobilized dye to the metal complex form is attainable at relatively high concentrations of the metal salt when the molar ratio of Ba(ClO4)(2) to vinylcaprolactam units approaches unity. It was shown that the dye undergoes reversible trans-cis photoisomerization and dark (thermal) cis-trans isomerization in both the swollen gel and dry polymer films.
- Добавил в систему: Насимова Ирина Рашитовна