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Photoinduced electron transfer via nonbuttressed metal-metal bonds. The photochemical study of binuclear complexes with platinum-thallium bonds
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology.
Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation.
Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russian Federation.
Tóth, I., Department of Inorganic and Analytical Chemistry, University of Debrecen, Hungary.
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2008 (English)In: Journal of Physical Chemistry A, ISSN 1089-5639, E-ISSN 1520-5215, Vol. 112, no 26, 5786-5793 p.Article in journal (Refereed) Published
Abstract [en]

The photochemistry of binuclear metal-metal bonded complexes [(NC) 5Pt-Tl(Solv)x] (solv is water or dimethylsulfoxide) has been studied in aqueous and dimethylsulfoxide solutions. Both stationary and nanosecond laser flash photolysis have been carried out on the species. The metal-metal bonded complexes have been photolyzed by irradiation into the corresponding intense MMCT absorption bands. Photoexcitation results in the cleavage of the platinum-thallium bond and the formation of a solvated thallous ion and a cyano complex of platinum(IV), [Pt(CN)5(Solv)]-, in both cases. The species have been characterized by multinuclear NMR and optical spectroscopy. The products of the photoreaction indicate a complementary two-electron transfer occurring between platinum and thallium ions in the binuclear Pt-Tl species. Quantum yield values for the photodecomposition of the species have been determined. The intermediates of the photoinduced metal-to-metal electron transfer have been detected and characterized by optical spectroscopy. The kinetics of transient formation and decomposition have been studied, and mechanisms of the photoactivated redox reaction have been suggested. © 2008 American Chemical Society.

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2008. Vol. 112, no 26, 5786-5793 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-45800DOI: 10.1021/jp7121278OAI: oai:DiVA.org:liu-45800DiVA: diva2:266696
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13

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Maliarik, Mikhail

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