Synthesis, Physico-Chemical Characterization and Antibacterial Studies of New Fe(III) and Cr(III) Complexes with an Ionic Liquid-Supported Schiff base ligand

Abstract

An ionic liquid-supported Schiff base 1-{2-(2-hydroxy-5-bromobenzylamine) ethyl}-3-ethylimidazolium tetrafluoroborate and its Fe(III) and Cr(III) complexes were prepared and characterized by various analytical and spectroscopic methods such as elemental analysis, UV-Visible, FT-IR, ¹H NMR, Mass-spectra, TGA/DTG, molar conductance and magnetic susceptibility measurements. Based on these spectral studies octahedral geometry was proposed for the both complexes. Molar conductance of the complexes showed their electrolytic nature. The  Schiff  base  ligand and its  complexes  were  tested  for in vitro antibacterial  activities against gram positive and gram negative bacteria to assess their inhibition potentials. Cr(III) complex showed higher activity than the Fe(III) complex against the tested bacteria S. aureus and E.coli.