Synthèse et étude des propriétés électrochimiques et complexantes de nouveaux composés bases de Schiff et leur application dans plusieurs domaines

Abstract

This work is devoted to the synthesis of new Schiff base compounds L and L', as well as their nickel and cobalt complexes, using physico-chemical analytical techniques. The structure of the ligand L was determined by X-ray diffraction. These compounds were evaluated as corrosion inhibitors for steel in acidic media, using different techniques: gravimetry, polarization curves and electrochemical impedance spectroscopy. The study focused on the influence of concentration and temperature. Morphological analysis of the metal surface was carried out using atomic force microscopy (AFM) and scanning electron microscopy (SEM). UV-Vis and SEM analyses confirmed the adsorption of these inhibitor molecules on the iron surface, forming an inhibitor-Fe complex. A correlation between molecular structures and inhibitory activity was performed using density functional theory (DFT) and molecular dynamics simulations (MDS). The antioxidant activity of the synthesized Schiff bases was evaluated using two tests: ferric iron reducing power (FRAP) measurement and β-carotene bleaching. The results show remarkable antioxidant properties