Photoprocesses in Guest–Host Complexes of a Styryl Dye Thio Derivative with Cucurbiturils

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Photoprocesses in aqueous solutions of the styryl dye 1-ethyl-4-{(E)-2-[4(methylthio)phenyl]vinyl}pyridinium perchlorate (1) and its complexes with cucurbit[n]urils (CB[n], n = 6–8) have been studied using the methods of stationary and time-resolved optical spectroscopy. The fluorescence intensity increases by approximately 3 times in 1 : 1 complexes of 1 and CB[6], whereas CB[7] has almost no effect on the fluorescence intensity. In 2 : 1 complexes with CB[8], the photocycloaddition reaction does not occur, with strong fluorescence quenching being associated with the formation of nonreactive dimers. The fluorescence decay kinetics of 1 has two characteristic times, 1.4 and ~130 ps, and changes little in the complexes. The photoinduced intramolecular charge transfer in 1 is an order of magnitude smaller than in the wellknown dye DASPI.

作者简介

A. Svirida

Photochemistry Center, Russian Academy of Sciences, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences

Email: ivanovd@photonics.ru
Moscow, 119421 Russia

D. Ivanov

Photochemistry Center, Russian Academy of Sciences, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences

Email: ivanovd@photonics.ru
Россия, 119421, Москва, ул. Новаторов, 7А-1

I. Kryukov

Photochemistry Center, Russian Academy of Sciences, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences

Email: ivanovd@photonics.ru
Moscow, 119421 Russia

N. Petrov

Photochemistry Center, Russian Academy of Sciences, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences

Email: ivanovd@photonics.ru
Moscow, 119421 Russia

N. Aleksandrova

Photochemistry Center, Russian Academy of Sciences, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences

Email: ivanovd@photonics.ru
Moscow, 119421 Russia

V. Avakyan

Photochemistry Center, Russian Academy of Sciences, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences

Email: ivanovd@photonics.ru
Moscow, 119421 Russia

S. Gromov

Photochemistry Center, Russian Academy of Sciences, Federal Research Center Crystallography and Photonics, Russian Academy of Sciences; Faculty of Chemistry, Moscow State University

编辑信件的主要联系方式.
Email: ivanovd@photonics.ru
Moscow, 119421 Russia; Moscow, 119991

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版权所有 © А.Д. Свирида, Д.А. Иванов, И.В. Крюков, Н.Х. Петров, Н.А. Александрова, В.Г. Авакян, С.П. Громов, 2023