Synthesis, spectroscopic, electrochemical, magnetic properties and super oxide dismutase activity of nickel (II) complexes with unsymmetrical Schiff base ligands

Abstract

pyrid-2-ylmethyl) ethylenediamine, have been synthesized and characterized by using elemental analyses, FAB (fast atomic bombardment), magnetic measurements, electronic absorption , conductivity measurements, cyclic voltammetry (CV) and IRspectroscopy. All the complexes yielded an irreversible couple that can be assigned to a Ni II → Ni I redox process. Infrared spectra, ligand field spectra and magnetic susceptibility measurements agree with the observed octahedral environment. H 2 BHM is a diprotic tridentate Schiff base ligand (ONO donor atom) whereas L 1-L 3 possessing N 3 coordination sites. The SOD activities have been measured using alkaline DMSO as a source of superoxide radical (O 2-) and nitro blue tetrazolium (NBT) as O 2 scavenger.