Synthesis, Characterization and Antibacterial Activities of Lanthanide Complexes with Schiff Base N-Salicylidene-1-aminoadamantane

Abstract

Fourteen solid complexes of the lanthanide(III) complexes of the type[Ln(NO₃)₃(HL)₂] (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, HL = C₁₇H₂₁NO, a Schiff base ligand derived from 1-aminoadamantane and salicylaldelyde have been synthesized and characterized by elemental analyses, molar electrical conductivities, spectra (Infrared, ¹H NMR) and thermal studies. The elemental analyses indicate 1:2 (metal:ligand) stoichiometry for the complexes. The spectral studies show that the ligand acts as a monodentate ligand with the phenolic-CO as coordinating site. The nitrate group is coordinated in a bidentate fashion. The ligand and the complexes were screened for antibacterial. It was found that activity against Escherichia coli and Bacillus subtilis has significantly enhanced on complexation.