The Facile Generation of a Tetramethyleneethane Type Radical Cation and Biradical Utilizing a 3,4-Di(α-styryl)furan and a Photoinduced ET and Back ET Sequence
作者:Teruyo Ikeda、Hiroshi Ikeda、Yasutake Takahashi、Masafumi Yamada、Kazuhiko Mizuno、Shozo Tero-Kubota、Seigo Yamauchi
DOI:10.1021/ja074000b
日期:2008.2.1
Product analyses and nanosecond time-resolved spectroscopy on laser flash photolysis were studied for the photoinduced electron-transfer reaction of 3,4-di(alpha-styryl)furan (6a). A combination of these results, kinetic, density functional theoretical (DFT), and time-dependent DFT analyses enabled assignment of the absorption to the tetramethyleneethane (TME)-type radical cation (7a*+, lambda(max)
针对 3,4-二 (α-苯乙烯基) 呋喃 (6a) 的光致电子转移反应,对激光闪光光解的产物分析和纳秒时间分辨光谱进行了研究。这些结果、动力学、密度泛函理论 (DFT) 和时间相关 DFT 分析的组合能够将吸收分配给四亚甲基甲烷 (TME) 型自由基阳离子 (7a*+, lambda(max) = 392 nm) 和相应的单线态双自由基 ((1)7a**, lambda(max) = 661 nm)。这两种中间体通过简单的反向电子转移反应在机械上相互连接。本研究为芳基取代的 TME 型中间体的生成提供了一种新方法。