Electrochemical Examination of Copper(II) Complexes with Octaazamacrocyclic Ligand and Heterocyclic Dithiocarbamate

Abstract

Abstract Mixed ligand dinuclear copper(II) complexes of the general formula [Cu 2 ( Rdtc ) tpmc )](ClO 4 ) 3 with octaazamacrocyclic ligand tpmc and four different heterocyclic dithiocarbamate ligands Rdtc − , as well as the complexes [Cu 2 ( tpmc )](ClO 4 ) 4 and [Cu( tpmc )](ClO 4 ) 2 ⋅2H 2 O were studied in aqueous NaClO 4 and HClO 4 solutions by cyclic voltammetry on glassy carbon electrode. The electrochemical properties of the ligands and Cu(II) complexes were correlated with their electronic structure. Conductometric experiments showed different stoichiometry in complexation of tpmc with Cu 2+ ions and transport of ions in acetonitrile and in aqueous media. These studies clarified the application of this macrocyclic ligand as ionophore in a PVC membrane copper(II) selective electrode and contributed elucidation of its sensor properties.