Interaction of Pt(II) and Au(III) with organic disulfides in hydrochloric aqueous solution

Abstract

The interaction of Pt(II) and Au(III) with disulfides (l-cystine, cystamine, dl-homocystine and 3,3′-dithiodipropionic acid) in hydrochloric acid aqueous solutions was studied. In the case of Pt(II), the oxidative addition reaction leads to formation of the Pt(IV) thiol complex. In the case of Au(III) disulfide, binding causes a reduction to Au(0) and oxidation of the disulfide to sulfonic acid. Cyclic voltammetry and different spectroscopic methods were used to study the process. The pattern of influence of the metallic properties for d⁸ ions in the direction of the reaction was found.

Keywords:

• Platinum(II)
• gold(III)
• organic disulfides
• redox reactions
• molecular spectroscopy

Acknowledgements

Authors thank Centre for Equipment Joint User of School of Petroleum and Natural Gas Engineering of Siberian Federal University for technical support and Zimonin D.V. for help in cyclic voltammetry studies.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science to the research project: “The interaction of platinum(II) and gold(III) with organic disulfides, obtaining and investigating the properties of sorbents based on them” No. 18-43-243013.