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)

摘要

The synthesis of a new ligand tetradentate Schiff base: 4,4'-bis[(4-diethyl aminosalicylaldehyde) diphenyl methane] diimine (H 2L), 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 N _2O _2 system. Thermal studies indicate that the ligand is more stable than the metal complexes (up to 310°C).