A Triad Based on an Iridium(III) Bisterpyridine Complex Leading to a Charge-Separated State with a 120-μs Lifetime at Room Temperature
作者:Lucia Flamigni、Etienne Baranoff、Jean-Paul Collin、Jean-Pierre Sauvage
DOI:10.1002/chem.200600002
日期:2006.8.25
A triad D-Ir-A, where Ir is an Ir(III) bisterpyridine complex connected through an amidophenyl spacer to D, a triphenylamine electron donor, and to A, a naphthalene bisimide electron acceptor, has been synthesized and electrochemically investigated. The photoinduced processes in the triad, which is more than 4-nm long, have been characterized by steady-state and time-resolved optical spectroscopy by
合成并电化学研究了三元组D-Ir-A,其中Ir是通过酰胺基苯基间隔基连接到三苯胺电子给体D和A,萘双酰亚胺电子受体上的Ir(III)二吡啶吡啶配合物。与模型二元组D-Ir,Ir-A和参比单体D,Ir相比,三元组中长于4 nm的三元组中的光诱导过程具有稳态和时间分辨光谱学特征。在激发D和Ir单元时发生顺序的电子转移,导致电荷分离状态D + -Ir--A的产率为100%,随后为D + -Ir-A-的产率约为10%。最终的电荷分离状态在室温下在无空气的乙腈中的寿命为120微米,在空气平衡的溶剂中的寿命为100微米。