Abstract

Prema. S and Leema Rose. A

DOI : http://dx.doi.org/10.13005/ojc/380328

The metal (II) complexes of picolinic acid are prepared in non- aqueous medium and its complexes are characterized by spectral studies (Infra-red spectroscopy, UV-Visible spectroscopy, 1H-NMR spectroscopy and ESR spectroscopy), conductance, magnetic susceptibility and thermal analysis. On heating, the complexes decompose at temperature above 260C. It revealed that all the complexes were stable. The FT-IR evidenced the C=O, C=N, O-H, C=C, and M-O functionalities of all the metal complexes along with corresponding ligands. Thermogravimetric study showed that there is no water molecule in the complexes. The electrochemical behavior of all metal complexes was investigated. From the electronic spectra the geometries of cobalt, nickel and copper is found to be Octahedral, Octahedral, and Distorted octahedral respectively. The complexes of the ligand are evaluated for anti-microbial activity hostile to fungal and bacterial strains. The nickel (II) complex reveals excellent inhibition again the selected four bacterial strains compare with other complexes.

Antimicrobial Activity; Cyclic Voltammetry; Metal (II) complexes; Picolinic acid

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