In vitro bacteriostatic and DNA interaction studies of drug-based mixed-ligand complexes of cobalt(II)

The dinuclear cobalt(II) complexes with ciprofloxacin and bidentate ligands were synthesized and characterized using infrared spectra, electronic spectra, magnetic measurements, elemental analyses, thermal investigation, and mass spectroscopy. Here in we tried to increase an antibacterial activity of ciprofloxacin drug due to formation of mixed-ligand complexes. Synthesized compounds were found to be more potent compared to drugs, ligands, and metal salt against selective gram(+ve) and gram(−ve) organisms. Interaction of the complexes with nucleic acid (DNA) was investigated using spectroscopic technique, viscosity measurement, and gel electrophoresis and it was found that the complexes bind to DNA via intercalative mode.