Fullerene Derivatives Functionalized with Diethylamino-Substituted Conjugated Oligomers: Synthesis and Photoinduced Electron Transfer
作者:Aline Gégout、Jean-François Nierengarten、Béatrice Delavaux-Nicot、Carine Duhayon、Alix Saquet、Andrea Listorti、Abdelhalim Belbakra、Claudio Chiorboli、Nicola Armaroli
DOI:10.1002/chem.200901216
日期:2009.9.7
diethylaniline groups of the OPV rods, thus making these systems suitable candidates for photoinduced electron transfer. Both the OPV and the fullerene‐centered fluorescence bands are quenched in toluene and benzonitrile, which suggests the occurrence of photoinduced electron transfer from the amino‐substituted OPVs to the carbon sphere in the dyads in both solvents. By means of bimolecular quenching experiments
已制备了二乙氨基取代的低聚亚苯基亚乙烯基(OPV)构建基块,并用于合成两个[60]富勒烯-OPV二聚体F-D1和F-D2,表现出不同的OPV片段共轭长度。这些受体-供体二元组的电化学性质已通过循环伏安法进行了研究。第一次还原总是分配给富勒烯部分,第一次氧化集中在OPV棒的二乙基苯胺基团上,因此使这些系统适合进行光致电子转移。在甲苯和苄腈中,OPV和以富勒烯为中心的荧光带均被淬灭,这表明在两种溶剂中,都发生了光致电子从氨基取代的OPV到二元体中的碳球的转移。通过双分子淬灭实验,在可见光(670 nm)和近红外光(1300–1500 nm)区域检测到了自由基阳离子物种的瞬态吸收光谱指纹,λ最大= 1030纳米。F-D1和F-D2中光致电子转移的确凿证据来自瞬态吸收测量。电荷分离状态在100 ps内形成,并在不到5 ns的时间内衰减。