Photoinduced electron transfer in covalently linked ruthenium tris(bipyridyl)-viologen molecules: observation of back electron transfer in the Marcus inverted region
作者:Edward H. Yonemoto、Richard L. Riley、Yeong Il Kim、Stephen J. Atherton、Russell H. Schmehl、Thomas E. Mallouk
DOI:10.1021/ja00047a017
日期:1992.10
The rates of photoinduced electron transfer (ET) in a series of donor-acceptor molecules (4,4'-R 2 -2,2'-bipyridine) 2 Ru(1-(4-CH 3 -2,2'-bipyridine-4'-yl-(CH 2 ) n )-4,4'-bipyridinediium-1'-R') 4+ (R=H, CH 3 ; R'=CH 3 , CH 2 CN; n=1, 2) were studied by picosecond flash photolysis/transient absorbance techniques. The rate of intramolecular forward ET (MLCT quenching) in acetonitrile varied with -ΔG
一系列供体-受体分子 (4,4'-R 2 -2,2'-联吡啶) 2 Ru(1-(4-CH 3 -2,2'-联吡啶) 中的光致电子转移 (ET) 速率-4'-基-(CH 2 ) n )-4,4'-联吡啶二鎓-1'-R') 4+ (R=H,CH 3 ;R'=CH 3 ,CH 2 CN;n=1, 2) 通过皮秒闪光光解/瞬态吸收技术研究。根据经典 Marcus 理论,n=2 时,乙腈中分子内正向 ET(MLCT 猝灭)的速率随 -ΔG o 变化,但 n=1 时则不然