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- Title
Photoprocesses in 2-Benzylidene-5-(Pyridin-3-ylmethylene)cyclopentanone and Its Derivatives in Acetonitrile.
- Authors
Gutrov, V. N.; Zakharova, G. V.; Nuriev, V. N.; Vatsadze, S. Z.; Gromov, S. P.; Chibisov, A. K.
- Abstract
Spectral, luminescent, and time-resolved properties of 2-bezylidene-5-(pyridin-3-ylmethylene)cyclopentanone and its derivatives with electron-donating substituents (diethylamino, methoxy, methylthio, and dimethoxy) on the benzene cycle have been studied in acetonitrile at room temperature. The presence of substituents causes a long-wavelength shift of the absorption band maximum by 26–114 nm in comparison with the unsubstituted dienone and a long-wavelength shift of the fluorescence maximum by 43–125 nm in comparison with the methoxy derivative. Under laser irradiation of oxygen-free dienone solutions, intersystem crossing to the triplet state occurs with a half-life of 0.7–1.5 μs. A stable photoproduct is formed for the methoxy, methylthio, and dimethoxy derivatives of dienone.
- Subjects
FLUORESCENCE; BENZENE derivatives; LASERS; ABSORPTION; BENZENE; IRRADIATION; ACETONITRILE
- Publication
High Energy Chemistry, 2020, Vol 54, Issue 3, p189
- ISSN
0018-1439
- Publication type
Article
- DOI
10.1134/S0018143920030066