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
NRC "Kurchatov Institute", Kurchatov Complex of Crystallography and Photonics, Photochemistry Center, Novatorov Str. 7A-1, Moscow 119421, Russia.
Department of Chemistry, M. V. Lomonosov Moscow State University, Build. 3, 1 Leninskie Gory, Moscow 119991, Russia.
Molecules. 2024 Aug 31;29(17):4139. doi: 10.3390/molecules29174139.
The photoprocesses of diethylamino derivatives of 1,4- and 1,3-distyrylbenzenes in MeCN were studied using absorption, luminescence, H NMR, and laser kinetic spectroscopy. Compounds and 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.
利用吸收光谱、发光光谱、核磁共振氢谱和激光动力学光谱研究了1,4 - 二苯乙烯基苯和1,3 - 二苯乙烯基苯的二乙氨基衍生物在乙腈中的光化学过程。化合物 和 发生系间窜越至三重态并表现出延迟荧光。得出的结论是，在电子供体或受体存在的情况下，三重态发生歧化反应时会形成染料自由基阴离子和自由基阳离子。对二乙氨基二苯乙烯基苯在基态和激发态的结构进行了量子力学计算，从而能够确定两种化合物的异构体结构和最稳定构象。
