Synthesis, Spectroscopic, and Electrochemical Characterization of a Schiff Base: 4,4′-bis[(4- diethylaminosalicylaldehyde)diphenyl methane]diimine and Its Complexes With Copper(II), Cobalt(II), and Cadmium(II)

Abstract

The synthesis of a new ligand tetradentate Schiff base: 4,4′-bis[(4-diethyl aminosalicylaldehyde) diphenyl methane] diimine (H₂L), obtained by condensation of 4,4′-diaminodiphenyl methane with 4-diethylaminosalicylaldehyde, and its complexes with copper(II), cobalt(II) and cadmium(II), is described. The metal complexes were characterized by elemental analysis, by UV-visible, infrared, and EPR spectroscopy, by cyclic voltammetry, and by thermal analysis (DTA-TG). The coordination of the metal ions to the ligand occurs through the N₂O₂ system. Thermal studies indicate that the ligand is more stable than the metal complexes (up to 310°C).

Keywords:

• cyclic voltammetry
• metal complexes
• Schiff base
• tetradentate