Photoinduced Electron Transfer Reactions of Ruthenium(II)-Complexes Containing Amino Acid with Quinones

被引：0
作者：
Rajkumar Eswaran
Swarnalatha Kalayar
Muthu Mareeswaran Paulpandian
Rajagopal Seenivasan
机构：
[1] Madurai Kamaraj University,School of Chemistry
[2] Vel Tech University,Department of Chemistry
[3] Manonmaniam Sundaranar University,Department of Chemistry
[4] Korea Advanced Institute of Science and Technology,Department of Chemical and Biomolecular Engineering
来源：
Journal of Fluorescence | 2014年 / 24卷
关键词：
Ru(II) complex; Electron transfer; Quinone; Transient absorption;
D O I：
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中图分类号：
学科分类号：
摘要：
With the aim of mimicking, at basic level the photoinduced electron transfer process in the reaction center of photosystem II, ruthenium(II)-polypyridyl complexes, carrying amino acids were synthesized and studied their photoinduced electron transfer reactions with quinones by steady state and time resolved measurements. The reaction of quinones with excited state of ruthenium(II)-complexes, I–V in acetonitrile has been studied by luminescence quenching technique and the rate constant, kq, values are close to the diffusion controlled rate. The detection of the semiquinone anion radical in this system using time-resolved transient absorption spectroscopy confirms the electron transfer nature of the reaction. The semiclassical theory of electron transfer has been successfully applied to the photoluminescence quenching of Ru(II)-complexes with quinones.
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页码：875 / 884
页数：9
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