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RAS Chemistry & Material ScienceЖурнал неорганической химии Russian Journal of Inorganic Chemistry

  • ISSN (Print) 0044-457X
  • ISSN (Online) 3034-560X

On Polymer Complexes of Gold(I) with Glutathione in Aqueous Solution

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PII
10.31857/S0044457X24100117-1
DOI
10.31857/S0044457X24100117
Publication type
Article
Status
Published
Authors
I. V. Mironov
  • Affiliation: Nikolaev Institute of Inorganic Chemistry of the Siberian Branch of the Russian Academy of Sciences
Volume/ Edition
Volume 69 / Issue number 10
Pages
1449-1458
Abstract
Processes involving gold(I) glutathionate complexes in aqueous solution at t = 25°C and I = 0.2 M (NaCl) in the pH range 7.20–6.06 (CAu = (5–10 × 10–4 M)) were studied. Using mass spectrometry, it was shown that at CGS > CAu, in addition to monomeric Au(GS)2*, there can exist polymeric forms Au4(GS)4*, as well as Aun(GS)n+1*, where n ≤ 4, the symbol * means the sum of forms of different degrees of protonation. From UV spectroscopy it follows that in the entire region of 0.5 < CGS/CAu < 3, spectra of four forms, including Au(GS)2*, are sufficient to describe all spectra within experimental errors in the form of a linear combination. As pH decreases, the proportion of Au(GS)2* decreases. The equilibrium constant 0.25 Au4(GSH)44– + GSH2– = Au(GSH)23– + H+ is equal to lgK = –4.4 ± 0.1 (I = 0.2 M, NaCl).
Keywords
соединения золота(I) тиолы полиядерные комплексы
Date of publication
17.09.2025
Year of publication
2025
Number of purchasers
0
Views
14

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