of a formyl-fullerenoporphyrinbuildingblock. Condensation of this aldehyde with pyrrole in CHCl3 with BF3·Et2O as catalyst followed by p-chloranil oxidation yielded a pentaporphyrinic scaffold surrounded by four peripheral C60 subunits. By following a similar strategy, a bis-porphyrin buildingblock bearing an aldehyde function was prepared and used for the construction of a nonaporphyrin array by
Exciplex Intermediates in Photoinduced Electron Transfer of Porphyrin−Fullerene Dyads
作者:Tero J. Kesti、Nikolai V. Tkachenko、Visa Vehmanen、Hiroko Yamada、Hiroshi Imahori、Shunichi Fukuzumi、Helge Lemmetyinen
DOI:10.1021/ja0257772
日期:2002.7.1
The photoinducedelectrontransfer in differently linked zinc porphyrin-fullerenedyads and their free-base porphyrin analogues was studied in polar and nonpolar solvents with femto- to nanosecond absorption and emission spectroscopies. A new intermediate state, different from the locally excited (LE) chromophores and the complete charge-separated (CCS) state, was observed. It was identified as an
在极性和非极性溶剂中使用飞秒到纳秒吸收和发射光谱研究了不同连接的锌卟啉-富勒烯二元组及其游离碱卟啉类似物的光致电子转移。观察到一种新的中间态,不同于局部激发 (LE) 发色团和完全电荷分离 (CCS) 状态。它被鉴定为激发复合物。激基复合物先于极性苯甲腈中的 CCS 态和非极性甲苯中富勒烯的激发单线态。二元组的行为通过使用涉及激基复合物和 LE 发色团之间平衡的常见动力学方案进行建模。该方案适用于所有研究的卟啉-富勒烯化合物。反应步骤的速率取决于部分之间的连接类型。