irradiation, a species in which two benzylradicals are linked together with an ethylene bridge was produced. From the ESR study, the radicals were found to form the benzylradical pair in harder solvents. The emission spectrum and the emission lifetime of the radical species showed remarkable dependence on the solvent viscosity. In harder solvents, a new broad emission was observed on the longer wavelength
研究了玻璃溶剂中 [2.2] 对环烷在 77 K 下的光化学。通过辐照,产生了一种物质,其中两个苄基通过亚乙基桥连接在一起。从 ESR 研究中,发现自由基在较硬的溶剂中形成苄基自由基对。自由基物种的发射光谱和发射寿命显示出对溶剂粘度的显着依赖性。在较硬的溶剂中,在苄基结构发射的较长波长一侧观察到新的宽发射。从激发光谱和发射寿命的研究中,该宽带被认为是自由基对的分子内准分子荧光。发现 [2.2] 对环芳烷的光反应是双光子的,