Enviar artigo por via de e-mail Interaction of the Bipyridyl Gold(III) Complex with Anions of Thiol-Containing Acids in Aqueous Solution
- Autores: Mironov I.1, Kharlamova V.1, Hu J.2
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Afiliações:
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences
- Novosibirsk State University
- Edição: Volume 68, Nº 3 (2023)
- Páginas: 342-348
- Seção: ФИЗИКОХИМИЯ РАСТВОРОВ
- URL: https://journals.rcsi.science/0044-457X/article/view/136333
- DOI: https://doi.org/10.31857/S0044457X22601651
- EDN: https://elibrary.ru/JDZGEF
- ID: 136333
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Resumo
The equilibria of stepwise substitution Au(bipy)
+ OH– = Au(bipy)ClOH+ + Cl– and Au(bipy)
+ 2OH– = Au(bipy)
+ 2Cl– in aqueous solution at T = 25°C and I = 0.2 M (NaCl), log β1 = 9.22, log β2 = 16.61 have been studied. For bipyridyl complexes Au(bipy)
(X = Cl, OH) at pH 2.0 and 7.4, redox interactions with anions of thiol-containing acids (glutathione, cysteine, thiomalate) have been studied. In all cases, at the initial stage, a rapid reduction of gold(III) to gold(I) was observed with the simultaneous release of bipyridyl. A detailed analysis of UV spectra showed that the main products of gold(III) reduction are highly stable gold(I) thiolate complexes. The presence of further slower steps depends on the initial ratio of thiol to gold.
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Sobre autores
I. Mironov
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences
Email: imir@niic.nsc.ru
630090, Novosibirsk, Russia
V. Kharlamova
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences
Email: imir@niic.nsc.ru
630090, Novosibirsk, Russia
J. Hu
Novosibirsk State University
Autor responsável pela correspondência
Email: imir@niic.nsc.ru
630090, Novosibirsk, Russia
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