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Crown ether styryl dyes .22. Synthesis and complexation of the cis-isomers of photochromic aza-15-crown-5 ethersстатья
Информация о цитировании статьи получена из
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Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Gromov S.P., Ushakov E.N., Fedorova O.A., Soldatenkova V.A., Alfimov M.V.
- Журнал: Russian Chemical Bulletin
- Том: 46
- Номер: 6
- Год издания: 1997
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 1143
- Последняя страница: 1148
- DOI: 10.1007/BF02496216
- Аннотация: New crown ether-containing styryl dyes of the benzothiazole series containing an aza-15-crown-5-ether moiety were synthesized. The trans-cis-photoisomerization of these dyes and their analogs was studied; the effect of metal cations on the kinetics of dark cis-trans-isomerization was elucidated. The stability constants of the complexes of the cis-isomers of these dyes with Ca(ClO4)(2) were estimated. The dramatic increase (by more than three orders of magnitude) in the stability of the complexes on passing from a cationic dye to a betaine was attributed to the formation of an intramolecular bond in the cis-complexes between the sulfo group of the N-substituent and the metal cation located in the cavity of the azacrown-ether moiety.
- Добавил в систему: Громов Сергей Пантелеймонович