Synthèse chimique de complexes-base de Schiff diiminiques, caractérisation spectrale et étude par voltampérométrie cyclique. Applications

Abstract

Two unsymmetrical tetradentate Schiff base ligands and their Ni and VO complexes were synthesized and characterized by the usual analytical methods, IR, UV-Vis and elemental analysis. The compounds prepared were studied by cyclic voltammetry and by hydrodynamic voltammetry in order to study their redox properties. In addition, an exhaustive description of the crystal structure of the complex of nickel (NiL1) has been reported by the X-ray diffraction technique. Theoretical calculations using the Density Functional Theory (DFT) method and the Time Dependent Density Functional Theory (TD-DFT) method were performed to compare the results obtained with the experimental data. On the other hand, the ligands and the corresponding complexes were examined for their antibacterial activities in agar medium by the disk diffusion method against certain Gram (+) and Gram (-) strains pathogenic for humans. Finally, the complexes of nickel and oxovanadium have been exploited in the oxidation catalysis reaction of cyclohexene in the presence of hydrogen peroxide.