Synthesis, Spectroscopic, Structural Characterization, Conductivity and Electrochemical Studies of a Schiff Base Ligand and Its Copper Complexes

Abstract

Electrochemical behaviors of a Schiff base ligand (L) derived from Glyoxal and 4-aminoantipyrine and its chloride and nitrate Cu(II) complexes were carried out by cyclic voltametric studies. The ligand (L) has been characterized by IR, NMR and electronic spectral studies. Cu(II) complexes of a Schiff base ligand from4-aminoantpyrine and glyoxal having the composition [CuL₁]x₂ where  x  = Cl^- or NO₃^- have been prepared and characterized by elemental analysis, electrical conductivity in non- aqueous  solvent, infrared and electronic, as well as cyclic voltammetric studies. L acts as a neutral tetra-dentate ligand coordinating through both the carbonyl oxygen and azomethine nitrogen. On both the complexes both the anions are not coordinated. A square planar geometry is assigned for complexes. The electrochemical studies of ligand show a typical cyclic voltammogram for an irreversible process. While copper(II) complexes show the typical cyclic voltammograms for quasi reversible process.

Keywords: Schiff base ligand, Schiff base copper(II) complexes, cyclic voltammetry