Photochemistry and electron-transfer mechanism of transition metal oxalato complexes excited in the charge transfer band

Autor:	Jie Chen, Ivan V. Tomov, Hua Zhang, Peter M. Rentzepis, Xunliang Ding
Rok vydání:	2008
Předmět:	Oxalates Reaction mechanism Multidisciplinary Photochemistry Chemistry Electrons Dissociation (chemistry) Bond length Kinetics Electron transfer Transition metal Intramolecular force Excited state Physical Sciences Organometallic Compounds Transition Elements Excitation
Zdroj:	Proceedings of the National Academy of Sciences. 105:15235-15240
ISSN:	1091-6490 0027-8424
DOI:	10.1073/pnas.0806990105
Popis:	The photoredox reaction of trisoxalato cobaltate (III) has been studied by means of ultrafast extended x-ray absorption fine structure and optical transient spectroscopy after excitation in the charge-transfer band with 267-nm femtosecond pulses. The Co–O transient bond length changes and the optical spectra and kinetics have been measured and compared with those of ferrioxalate. Data presented here strongly suggest that both of these metal oxalato complexes operate under similar photoredox reaction mechanisms where the primary reaction involves the dissociation of a metal–oxygen bond. These results also indicate that excitation in the charge-transfer band is not a sufficient condition for the intramolecular electron transfer to be the dominant photochemistry reaction mechanism.
Databáze:	OpenAIRE
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