Organoplatinum(II) Complexes with Chromophore-Acceptor Dyad Studied by Ultrafast Time-Resolved Absorption Spectroscopy

被引：11

作者：

Lai, Siu-Wai ^{[1
,2
,3
]}

Chen, Yong ^{[1
]}

Kwok, Wai-Ming ^{[2
,3
,4
]}

Zhao, Xi-Juan ^{[1
]}

To, Wai-Pong ^{[2
,3
]}

Fu, Wen-Fu ^{[1
]}

Che, Chi-Ming ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R China

[2] Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

[3] Univ Hong Kong, HKU CAS Joint Lab New Mat, Hong Kong, Hong Kong, Peoples R China

[4] Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Kowloon, Hong Kong, Peoples R China

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2010年 / 5卷 / 01期

基金：

中国国家自然科学基金;

关键词：

chromophores; electron transfer; hydrogen; platinum; viologen; PHOTOINDUCED ELECTRON-TRANSFER; VISIBLE-LIGHT; LINKED DYADS; HYDROGEN; DONOR; WATER; PORPHYRIN; PHOTOGENERATION; RUTHENIUM(II); MOLECULES;

D O I：

10.1002/asia.200900304

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photoinduced ET reaction from PtIIchromophore to viologen acceptor in a new ultrafast time-resolved absorption spectroscopy has been reported. Photoinduced electron-transfer (ET) reactions are fundamental steps in photosynthesis, and which have led to extensive investigations into charge-separated species in artificial mimics. The development of the absorption maxima at 395 and 605 nm could be attributed to the formation of methyl viologen radical cation as a result of oxidative decomposition of TEOA. The back ET reaction rate constants of the two platinum (II) systems are slower than the forward electron-transfer reactions, despite the large driving force. Efforts to harness the slow back ET reactions of PtII chromophore acceptor systems for light-induced multi-electron-transfer catalysis are in progress.

引用

页码：60 / 65

页数：6

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