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Supramolecular Assembler Based on Cucurbit[8]uril: Photodimerization of a Styryl Dye in Waterстатья
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: 2 ноября 2014 г.
- Авторы: Ivanov D.A., Petrov N.Kh, Alfimov M.V., Vedernikov A.I., Gromov S.P.
- Журнал: High Energy Chemistry
- Том: 48
- Номер: 4
- Год издания: 2014
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 253
- Последняя страница: 259
- DOI: 10.1134/S0018143914040079
- Аннотация: Photolysis of aqueous solutions of styryl dye 1 in the presence of cucurbit[8]uril (CB[8]) has been studied by optical spectroscopic methods for the molar ratios n = cCB[8]/c1 in the range of 0 ≤ n ≤ 6. It has been found that the inclusion complexes (1)2@CB[8] dominate in the solution at n ≤ 0.5, whereas the complexes 1@CB[8] dominate at n ≥ 1. The stability constants have been determined for the 1 : 1 (log K1 = 6.2 (L mol–1)) and 2 : 1 (log β = 11.9 (L2 mol–2)) complexes. The fluorescence decay kinetics of dye 1 in the presence of CB[8] is two-exponential, with the average lifetime increasing substantially at n ≥ 1. It has been shown that the system can operate in the cyclic mode as an assembler (or supramolecular catalyst) in the photodimerization reaction of dye 1 to form cyclobutane derivative 2. The stability constant of the complex 2@CB[8] (log K3 = 5.9 (L mol–1)) and the quantum yield of cycloaddition (ϕ ≈ 0.07 at n ≈ 0.5) have been determined.
- Добавил в систему: Громов Сергей Пантелеймонович