Electron Transfer Triggered by Optical Excitation of Phenothiazine-tris(meta-phenylene-ethynylene)-(tricarbonyl)(bpy)(py)rhenium(I)

被引：11

作者：

Bingoel, Bahar ^{[1
]}

Durrell, Alec C. ^{[2
]}

Keller, Gretchen E. ^{[2
]}

Palmer, Joshua H. ^{[1
]}

Grubbs, Robert H. ^{[1
]}

Gray, Harry B. ^{[2
]}

机构：

[1] CALTECH, Div Chem & Chem Engn, Arnold & Mabel Beckman Lab Chem Synth, Pasadena, CA 91125 USA

[2] CALTECH, Beckman Inst, Pasadena, CA 91125 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2013年 / 117卷 / 16期

基金：

美国国家科学基金会;

关键词：

BRIDGE-ACCEPTOR SYSTEMS; METAL-LIGAND COMPLEX; MOLECULAR WIRES; CHARGE-TRANSFER; TEMPERATURE-DEPENDENCE; INDUCED LUMINESCENCE; COUPLING MAGNITUDE; DIIMINE COMPLEXES; SHAPED MOLECULES; INVERTED REGION;

D O I：

10.1021/jp3010053

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated excited-state electron transfer in a donor-bridge-acceptor complex containing phenothiazine (PTZ) linked via tris(meta-phenylene-ethynylene) to a tricarbonyl(bipyridine)(pyridine)Re(I) unit. Time-resolved luminescence experiments reveal two excited-state (*Re) decay regimes, a multiexponential component with a mean lifetime of 2.7 ns and a longer monoexponential component of 530 ns in dichloromethane solution. The faster decay is attributed to PTZ -> *Re electron transfer in a C-shaped PTZ-bridge-Re conformer (PTZ-Re 7.5 angstrom). We assign the longer lifetime, which is virtually identical to that of free *Re, to an extended conformer (PTZ Re > 20 angstrom). The observed biexponential *Re decay requires that interconversion of PTZ-bridge-Re conformers be slower than 10(6) s(-1).

引用

页码：4177 / 4182

页数：6

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