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
收藏
页码：60 / 65
页数：6
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