Photoprocesses in Bis-Diethylamino Derivatives of 1,4- and 1,3-Distyrylbenzene

The photoprocesses of diethylamino derivatives of 1,4- and 1,3-distyrylbenzenes in MeCN were studied using absorption, luminescence, 1H NMR, and laser kinetic spectroscopy. Compounds 1 and 2 undergo intersystem crossing to the triplet state and exhibit delayed fluorescence. It was concluded that dye...

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Published inMolecules (Basel, Switzerland) Vol. 29; no. 17; p. 4139
Main Authors Atabekyan, Levon S., Avakyan, Vitaly G., Fomina, Marina V., Nuriev, Vyacheslav N., Medved’ko, Alexey V., Vatsadze, Sergey Z., Gromov, Sergey P., Chibisov, Alexander K.
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 31.08.2024
Subjects
distyrylbenzene
Electrons
fluorescence
Kinetics
laser photolysis
Lasers
Photonics
radical species
Spectrum analysis
triplet–triplet dismutation
laser photolysis
radical species
distyrylbenzene
fluorescence
triplet–triplet dismutation
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Summary:The photoprocesses of diethylamino derivatives of 1,4- and 1,3-distyrylbenzenes in MeCN were studied using absorption, luminescence, 1H NMR, and laser kinetic spectroscopy. Compounds 1 and 2 undergo intersystem crossing to the triplet state and exhibit delayed fluorescence. It was concluded that dye radical anions and radical cations are formed upon dismutation of the triplet state in the presence of an electron donor or acceptor. Quantum mechanical calculations for the structures of diethylamino distyrylbenzenes in the ground and excited states were carried out, making it possible to establish the structures of isomers and the most stable conformers for both compounds.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules29174139