呋喃香豆素中激发能的迁移
Migration of Excitation Energy in Furocoumarins.
作者信息
Tchaikovskaya O N, Dmitrieva N G, Bocharnikova E N, Chaidonova V S, Avramov P V
机构信息
Laboratory Photophysics and Photochemistry of Molecules, Department of Physics, Tomsk State University, Tomsk, Russia.
Laboratory of Quantum Electronics, The Institute of Electrophysics of the Ural Division of the Russian Academy of Sciences, Ekaterinburg, Russia.
出版信息
Front Chem. 2021 Nov 4;9:754950. doi: 10.3389/fchem.2021.754950. eCollection 2021.
The migration of excitation energy of a number of psoralen compounds has been studied. For this, the methods of induced absorption spectroscopy, stationary electron spectroscopy, fluorescence and phosphorescence, as well as quantum chemistry were used. A comparative photostability of psoralen was achieved by exposure to a XeCl excilamp irradiation (emission wavelength λ = 308 nm) with parameters Δλ = 5-10 nm, W = 18 mW/cm, = 8.1 J/cm, f = 200 kHz, pulse duration 1 μs. It was found that the singlet-triplet transition played a major role in the migration of excitation energy into triplet states. Among all tested compounds, substances with an OCH-group in the structure have the strongest effect on the spectral-luminescent characteristics.
对多种补骨脂素化合物的激发能量迁移进行了研究。为此，采用了诱导吸收光谱法、稳态电子光谱法、荧光和磷光法以及量子化学方法。通过用参数为Δλ = 5 - 10 nm、W = 18 mW/cm²、E = 8.1 J/cm²、f = 200 kHz、脉冲持续时间1 μs的XeCl准分子灯照射（发射波长λ = 308 nm），实现了补骨脂素的相对光稳定性。发现单重态 - 三重态跃迁在激发能量向三重态的迁移中起主要作用。在所有测试化合物中，结构中含有OCH基团的物质对光谱 - 发光特性的影响最强。
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