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Spectroscopy of surface-enhanced Raman scattering of a complex with charge transfer between a bis-crown-containing stilbene and a bis-ammonium-alkyl derivative of dipyridylethyleneстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Alaverdyan Y.S., Feofanov A.V., Gromov S.P., Vedernikov A.I., Lobova N.A., Alfimov M.V.
- Журнал: Optics and Spectroscopy (English translation of Optika i Spektroskopiya)
- Том: 97
- Номер: 4
- Год издания: 2004
- Издательство: Optical Society of America
- Местоположение издательства: United States
- Первая страница: 560
- Последняя страница: 566
- DOI: 10.1134/1.1813697
- Аннотация: The structure of a charge transfer complex (CTC) formed by a bis-crown-containing stilbene (1) and a dipyridylethylene derivative (2) is studied by surface-enhanced Raman scattering spectroscopy. It is found that an excess of 2 leads to the formation of a 1:1 CTC structure ([1.2]), whereas an excess of 1 leads to the stabilization of a sandwichlike 2:1 CTC structure ([1.2.1]). It is also revealed that 1 and diperchlorate of 1-ammoniumpropyl-4-methylpyridinium (5) form a 1:1 CTC structure, which is much less stable. Analysis of the surface-enhanced Raman scattering data suggests that, in complete agreement with the Mulliken theory, the CTCs under study are ordinary molecular complexes in the ground state and the interaction of a molecular complex with a photon excites the former. The excitation is accompanied by a significant transfer of the electron density from the donor I to the acceptor 2 (5). The structural fragments of the molecules responsible for the intermolecular interaction and charge transfer are ascertained using model compounds. The charge transfer in donor-acceptor pairs occurs between the electronic systems of trisubstituted benzene and pyridine. A CTC of the [1.2] or [1.2.1] type contains two equivalent donor-acceptor pairs; however, only one of them is involved in the charge transfer. (C) 2004 MAIK "Nauka/Interperiodica".
- Добавил в систему: Громов Сергей Пантелеймонович