Spectroscopic and electrochemical investigation of mixed – ligand transition metal complexes with 2N-salicylidine-5-(p-nitrophenyl)-1, 3, 4-thiadiazole and 5, 5’-Me2bipy in aqueous medium

Abstract

Herein we reported the spectroscopic and electrochemical investigation of four transition metal complexes viz. VO(II), Co(II), Ni(II) and Cu(II) of 2N-salicylidine-5-(p-nitrophenyl)-1, 3, 4-thiadiazole Schiff base ligand (L) and 5,5’-dimethyl-2,2’-bipyridine (Me2bipy) in the aqueous (1: 1: 1 molar ratio) medium. Transition metal complexes were characterized by microanalysis, FT-IR, electronic absorption and mass spectroscopy. Electrochemistry of transition metal complexes was studied in aqueous medium by using cyclic voltammetry (CV) at glassy carbon working electrode (GCE) versus Ag/AgCl. The reduction potential of the VO (II) and Cu (II) becomes more negative with increasing scan rate while Co (II) and Ni (II) positive show easier reduction.