Photochemistry and Photophysics of (<i>p</i>-Benzoylphenyl)diphenylmethyl and (<i>p</i>-Benzoylphenyl)bis(4-<i>tert</i>-butylphenyl)methyl Radicals in Different Solvents
作者:Viktor V. Jarikov、Alexandre V. Nikolaitchik、Douglas C. Neckers
DOI:10.1021/jp000227g
日期:2000.6.1
rt-butylphenyl)methyl (2) in various solvents were investigated. The photophysical parameters of the first excited doublet state of the radicals were measured using spectroscopic and kinetic methods and led to a “molecular rotor” model to characterize the excited-state behavior. The charge-transfer excited state for both radicals was observed. Photoproducts separated from the photolysis of 1 and 2
研究了(对苯甲酰基苯基)二苯甲基(1)和(对苯甲酰基苯基)双(4-叔丁基苯基)甲基(2)在各种溶剂中的光化学反应。使用光谱和动力学方法测量自由基的第一激发双重态的光物理参数,并产生“分子转子”模型来表征激发态行为。观察到两种自由基的电荷转移激发态。从苯中 1 和 2 的光解中分离出来的光产物表明光分解通过 H 提取 (55%)、碎裂 (20%)、环化 (10%) 和添加 (10%) 进行。