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1 Polish Journal of Chemistry

1 2002

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Voltammetric and Spectroscopic Behaviour of the Copper Adducts of Thiol and Thioether Ligands under Aerobic and Anaerobic Conditions

Çakir S., Biçer E., Coşkun E., Naumov P., Çakir O.

Polish Journal of Chemistry

2002

Vol. 76 / nr 5

663-669

Joint spectroscopic (ESR, electronic absorption and FT IR) and voltammetric (squarewave 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.