In this work, a bidentate Schiff base ligand (HL) based on N and O donor heteroatoms has been used to synthesize a series of new stable metal complexes of general composition of M(L)2 with M = Mn, Ni and VO. The ligand was obtained from the condensation of 2-methoxybenzylamine with 2,3dihydroxybenzaldehyde in methanolic medium. The complexes were formed by mixing the metal acetate salts and the ligand in 1:2 molar ratio. The resulting three complexes have been characterized by different analytical techniques, including FT-IR, UV-Vis, mass spectroscopies, thermogravimetry and cyclic voltammetry, to study their molecular structure and redox/electrochemical properties. Moreover, the effect of the metal on the complexes electronic properties, and their predicted reactivity, has been studied by Density Functional Theory (DFT). The spectroscopic results suggest that the metal is bonded to the ligand through the phenolic-like oxygen and the imine-type nitrogen atoms. Electronic and vibrational absorption spectra of the nickel complex suggest a square-planar geometry around the central metal ion Ni(II), while square-pyramidal and octahedral geometry have been proposed for VO(IV) and Mn(II) complexes. The thermogravimetric analyses of the complexes confirmed the presence of water molecules in their structures and thermal decomposition led to the formation of metal oxides as residues. The voltammogram of the Ni(II) complex suggests the existence of quasi-reversible redox system in DMSO solution.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.