New Co(II) and Cu(II) complexes derived from an imidazolium ionic liquid-based Schiff base : Synthesis, Physico chemical characterization and exploration of Antibacterial activities

Abstract

Two new Co(II) and Cu(II) complexes from an imidazolium ionic liquid based Schiff base 1-{2-(2-hydroxy-5-nitrobenzylideneamino)ethyl}-3-ethylimidazolium tetrafluoro -borate were synthesized and characterized by different analytical and spectroscopic techniques such as elemental analysis (CHN analysis), UV-Visible, 1 H-NMR, FT-IR, Mass-spectra, Powder X-ray diffraction analysis, magnetic susceptibility measurements and molar conductance data. From these analytical results, tetra coordinated 1:2 metal-ligand stoichiometry was suggested for the both complexes. The molar conductance data of the complexes revealed their electrolytic nature (1:2). The synthesized complexes along with the ligand were screened for in vitro antibacterial applications against gram negative and gram positive bacteria to assess their inhibition potentials. The complexes were proved very effective against the tested organisms.