2010•Chemistry worldRequires access

Synthesis and Antibacterial Activity of Bis(pyridine-2-carboxaldehyde)-p-phenylenediamine Rare Earth Complexes

Rongmei Liu

Abstract

A Schiff base ligand derived from bis-pyridine-2-carboxaldehyde with p-phenylenediamine and its six new rare earth complexes were synthesized in ethanol.The complexes were characterized by elemental analysis,molar conductance, IR,thermogravimetric and magnetic measurements.The complex type is 2∶2 type(RE: L) and the electrolyte type is 1∶2 type.The likely formula for the complexes is inferred as [RE_2L_2(Pic)_4(H_2O)_2](Pic)_2·nH_2O(RE=La、Ce、Pr、Nd,n=0;RE=Sm、Eu,n=2),with the central rare earth ions attaining nine-coordination.The agar diffusion antibacterial test shows that the complexes are active against the Staphylococcus aureus,Escherichia coli and Bacillus subtilis.

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Key concepts: Chemistry, Pyridine, Antibacterial activity, Bacillus subtilis, Nuclear chemistry, Ligand (biochemistry), Schiff base, Rare earth