Physicochemical, spectral and antibacterial studies of mixed ligand lanthanum complexes

The mixed ligand lanthanum complexes were synthesized from N- and O- donour ligands. The cupron ((2Z)-2-(N-hydroxyimino)-1,2-diphenylethan-1-ol) was used as a primary ligand and L-alanine, L-arginine and L-hydroxy proline were used as secondary ligands for synthesis. The physicochemical and spectral methods, viz elemental analysis, molar conductance, magnetic susceptibility measurements, UV-Visible sperctroscopy, IR spectroscopy, thermal analysis and XRD were used for characterization of synthesized complexes. The metal ion, primary ligand and secondary ligand were reacted and the complex was formed in 1:2:1 ratio which was confirmed by elemental analysis. The molar conductance data of synthesized complexes concludes their non-electrolytic behaviour. The data from studies of magnetic susceptibility measurements concludes diamagnetic properties of the synthesized complexes. The coordination of metal ion with cupron and amino acids was confirmed by UV-Visible and IR spectroscopy. The presence of metal ion, primary ligand and secondary ligand was confirmed by thermal and XRD studies. The synthesized lanthanum complexes were screened and studied against selective micro-organisms.