Photochemistry of Locally Excited and Intramolecular Charge Transfer States of a Disilane Bearing a Cyclic Arylethenyl Electron Acceptor Substituent
作者:Mark G. Steinmetz、Changjun Yu、Lin Li
DOI:10.1021/ja00082a014
日期:1994.2
exhibits a fluorescence at λ>400 nm, which strongly shifts to the red with increasing polarity of the solvent. The corresponding solvatochromic plot is indicative of an emissive, lowest energy charge-transfer (CT) state. Stern-Volmer quenching of the fluorescence by dilute methanol in pentane gives a linear plot with a unit intercept and a slope k Q τ ct =0.70. Quenching is accompanied by formation of
1-(对氰基苯基)-2-(五甲基二硅烷基)环戊烯 (1) 在 λ>400 nm 处显示出荧光,随着溶剂极性的增加,该荧光强烈地向红色转移。相应的溶剂化变色图表示发射的最低能量电荷转移 (CT) 状态。通过戊烷中的稀释甲醇对荧光进行 Stern-Volmer 猝灭,给出了具有单位截距和斜率 k Q τ ct =0.70 的线性图。淬火伴随着(芳基环戊烯基)二甲基硅烷 7 的形成,这是在甲醇存在下光解 1 时观察到的主要产物。7 的量子产率与甲醇浓度的线性双倒数图证明了这一点,它给出了与荧光猝灭一致的 ak Q τ ct 值