Voltammetric and spectroscopic behaviour of the copper adducts of thiol and thioether ligands under aerobic and anaerobic conditions

Çakır Ş., Biçer E., Coşkun E., Naumov P., Çakir O.

Polish Journal of Chemistry, vol.76, no.5, pp.663-669, 2002 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 5
  • Publication Date: 2002
  • Journal Name: Polish Journal of Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.663-669
  • Keywords: Aminoacids, Copper complexes, Redox reactions, Spectroscopy, Thioether, Thiol, Voltammetry
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Joint spectroscopic (ESR, electronic absorption and FT IR) and voltammetric (square-wave and cyclic voltammetry) techniques were employed to investigate the properties of copper adducts with cysteine, N-acetylcysteine and methionine under aerobic and anaerobic conditions. The metal oxidation state in the solid and solvated adducts adheres to the presence of oxygen, whereas ESR results (g∥ = 2.245, g⊥ = 2.059, A∥ = 170 Gauss) reveal tetragonally distorted octahedral copper(II) environment under aerobic circumstances. In presence of the thiol and thioether ligands under nitrogen voltammetric measurements evidence formation of copper(I) species.