Spectroscopic characterization and thermal studies of bioactive nickel (II) and palladium (II) complexes with Schiff base ligands
Anant Prakash and Monika Agarwal
Journal Title:Journal of Chemical, Biological and physical sciences
The new series of nickel (II) and palladium (II) complexes with different
bidentate Schiff base ligands have been prepared and characterized by various
spectroscopic as well as thermal studies. An infrared spectrum indicates coordination
of metal ions through azomethine nitrogen and acetate/nitrate ions. The presence of
water molecule(s) in the complexes has been supported by TG/DTA studies. Mass
spectrum explains the successive degradation of the molecular species in solution and
justifies ML complexes. Kinetic and thermodynamic parameters were computed from
the thermal data using Coats and Redfern method, which confirm first order kinetics.
The bio-efficacy of the complexes has been examined against the growth of bacteria
in vitro to evaluate their anti-microbial potential. Molecular structure of the
complexes has been optimized by MM2 calculations and suggests an octahedral/
square planar geometry.