Synthesis, Characterization, and Electrochemical Studies of Ternary Complexes of Lanthanum(III) and Cerium(III) with Some Naphthylideneamino Acids and Imidazoles
摘要:
A new series of ternary lanthanium(III) and cerium(III) complexes containing Schiff bases derived from some amino acids, viz: glycine; alanine; phenylalanine; valine and leucine with 2-hydroxy-1-naphthaldehyde as primary ligands, and 1-methylimidazole & 1,2-dimethylimidazole as secondary ligands were synthesized. The complexes were characterized on the bases of microanalyses, electrical conductance, IR & H-1 NMR spectra, thermal analysis and cyclic voltammetric data. All complexes were found to be non-electrolytes with the general formula of [ML(NO3 )Im center dot nH(2)O] (where M = La(III) or Ce(III), L = naphthylideneamino acids, Im = 1-methylimidazole or 1,2-dimethylimidazole and n = 1 or 2). The redox properties of some of the ternary complexes of La(III) and Ce(III) were examined using cyclic voltammetry in 0.1 mol dm(-3) TBAP/DMSO solutions. The reduction potentials of the investigated complexes showed a dependence upon the nature of the amino acid of the ligand. The stability of the complexes is discussed on the basis of the thermal and electrochemical data.
Synthesis, Characterization, and Electrochemical Studies of Ternary Complexes of Lanthanum(III) and Cerium(III) with Some Naphthylideneamino Acids and Imidazoles
摘要:
A new series of ternary lanthanium(III) and cerium(III) complexes containing Schiff bases derived from some amino acids, viz: glycine; alanine; phenylalanine; valine and leucine with 2-hydroxy-1-naphthaldehyde as primary ligands, and 1-methylimidazole & 1,2-dimethylimidazole as secondary ligands were synthesized. The complexes were characterized on the bases of microanalyses, electrical conductance, IR & H-1 NMR spectra, thermal analysis and cyclic voltammetric data. All complexes were found to be non-electrolytes with the general formula of [ML(NO3 )Im center dot nH(2)O] (where M = La(III) or Ce(III), L = naphthylideneamino acids, Im = 1-methylimidazole or 1,2-dimethylimidazole and n = 1 or 2). The redox properties of some of the ternary complexes of La(III) and Ce(III) were examined using cyclic voltammetry in 0.1 mol dm(-3) TBAP/DMSO solutions. The reduction potentials of the investigated complexes showed a dependence upon the nature of the amino acid of the ligand. The stability of the complexes is discussed on the basis of the thermal and electrochemical data.