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Photooxidation of AuCl₂⁻ and AuBr₂⁻ Induced by ds Excitation

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Kunkely, Horst ; Vogler, Arnd
Date of publication of this fulltext: 17 Mar 2010 06:26


In the presence of electron acceptors such as CHzC12 or 02, the irradiation of AuC12- or AuBrz- in acetonitrile led
to the photooxidation of Au(1) to Au(II1). AuC14- and AuBr4- were formed as final products when additional halide
was present. The reactive excited states were of the metal-centered ds type. The photooxidations were reversed
in solutions of ethanol. AuC14- and AuBr4- underwent a photoreduction to AuC12- and AuBrz-, respectively.

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