Synthesis, Physical and Spectral Investigations and Biological Studies of Mixed Ligand Lanthanum Complexes

Abstract

In the present study the synthesis of mixed ligand lanthanum complexes has been carried out by using (2Z)-2-(N-hydroxyimino)-1,2-diphenylethan-1-ol as a primary ligand and various amino acids such as               L-proline, L-valine and L-serine as secondary ligands. Different physico-chemical methods viz. elemental analysis, magnetic susceptibility measurements and complexometric estimation; spectroscopic methods viz. UV-Visible, IR and XRD and thermal analysis were used for characterization of lanthanum complexes. Elemental analysis and complexometric estimation confirm the contents of metal and elements (C, H, N) in synthesized lanthanum complexes. The non-electrolytic and diamagnetic properties of the complexes are revealed by conductometric method and room temperature magnetic susceptibility technique respectively. The transition of the electrons during formation of complexes is revealed by the study of electronic absorption spectra. The functional groups present in complexes are concluded by FTIR spectra. Water molecules and moieties of primary and secondary ligands are confirmed by thermal and XRD analysis. The anti-bacterial study of the lanthanum complexes has been carried out by tube dilution and agar cup methods.