Affiliation:
1. Nikolaev Institute of Inorganic Chemistry SB RAS 3 Lavrentiev Avenue Novosibirsk 630090 Russia
Abstract
AbstractThe interaction of a number of gold(III) complexes: Au(phen)X2+, Au(bipy)X2+ (X=Cl, OH, phen=1,10‐phenanthroline, bipy=2,2’‐bipyridile), Au(en)23+ and Au(dien)Cl2+ with anions of thiol‐containing acids (thiomalate, cysteine and glutathione) in an aqueous solution at pH 2.0 and 7.4, CNaCl=0.2 M was studied. In all cases, the products of gold(III) reduction were highly stable gold(I) thiolate complexes: polymeric Aum(RS)n or monomeric Au(RS)2, depending on the conditions. For bipy and phen complexes, the processes were fast and usually completed in less than 1 minute. For the complex with dien, the stage of inner‐sphere reduction was the slowest among the complexes under consideration. For this complex, at pH 7.4 and with a large excess of glutathione, the formation of a relatively long‐lived gold(III) complex was observed, which, according to MS data, has the composition Au(GSH)45–. At ordinary temperature, it decomposes by about 90 % in 20 hours. For other thiols, similar complexes are also formed, but the rate of their decomposition is about 10 times higher.
Funder
Ministry of Science and Higher Education of the Russian Federation
Cited by
1 articles.
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