Studies on Some Mixed Ligand Ternary Complexes of Cerium(III) Employing 1-Nitroso-2-naphthol and Amino Acids

Abstract

The mixed ligand ternary complexes of cerium(III) with general formula [Ce(1N2N)2•(L)•2H2O] where (1N2N) = 1-nitroso-2-naphthol primary ligand and L = different amino acids (L-valine, L-serine and L-isoleucine) as a secondary ligands have been prepared and characterized by IR, UV-visible spectroscopic technique, TG-DTA studies, elemental analysis, magnetic and molar conductance studies. The magnetic susceptibility study indicates paramagnetic nature of the complexes. The electrical conductance values of all the complexes shows their non-electrolytic nature. The metal-ligand bonding through nitrogen and oxygen atom was confirmed by FT-IR spectral studies. The antimicrobial activities of the compounds have been tested against S. aureus, C. diphtheria, E. coli and S. typhi. These complexes show better antibacterial activity than free ligand.

Preparation Of Mixed Ligand Complexes Of Cerium (III) Metal Using Multidentate Ligands And Investigation Of Their Physicochemical, Spectral, Thermal, And Antibacterial Properties.

“…Journal of Advanced Zoology [25]. The elemental composition analysis of the complexes was carried to find the carbon, hydrogen and nitrogen content which indicates the general formula of 1:2:1 for all complexes [24].…”

“…Lanthanides, with a particular emphasis on cerium metal, have been subjects of interest in the synthesis and characterization of metal complexes. Studies focusing on their biological activities, especially antibacterial and antimicrobial effects, have contributed significantly to the understanding of these systems [10][11][12][13]. In recent years, organic compounds with donor atoms like nitrogen (N), oxygen (O), and sulfur (S), coupled with active functional groups including -COOH, -NH2, -SH, and -OH, have attracted considerable attention.…”