Photoinduced Electron Transfer Reactions of Hexarhenium(III) Cluster: Oxidative Quenching of [Re6S8Cl6]4− Emission by Electron Acceptors

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作者
Noboru Kitamura
Natsuki Kobayashi
Shoji Ishizaka
Takashi Yoshimura
Haeng-Boo Kim
Yoichi Sasaki
机构
[1] Hokkaido University,Department of Chemistry, Faculty of Science
[2] Hiroshima University,Department of Chemistry, Graduate School of Science
[3] Osaka University,Radioisotope Research Center
[4] Ibaraki University,Department of Chemistry, Faculty of Science
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Hexarhenium(III) cluster; Photoinduced electron transfer; Charge separation;
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摘要
The photoredox ability of a hexarhenium(III) cluster, [Re6(μ3-S)8Cl6]4−, in acetonitrile was examined on the basis of the emission quenching experiments of the cluster by a series of neutral organic electron acceptors (A). The photoinduced electron transfer quenching rate constants and the relevant activation parameters demonstrated that the hexarhenium(III) cluster acted as a useful photoredox sensitizer towards various A and the system gave a high charge separation yield owing to electrostatic repulsion between the product ions: [Re6(μ3-S)8Cl6]3− and A−. These results were proved explicitly by nanosecond transient absorption spectroscopy.
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页码:211 / 221
页数:10
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