Synthesis, characterization, electrochemical study, and antimicrobial activity of bis(benzoylacetonato) vanadium(IV) complexes of biphenylphenols

Abstract

New non-oxovanadium(IV) complexes of biphenylphenols, [VCl_{2− n} (bzac)₂(OAr^1,2) _n ], have been synthesized in quantitative yields from the reaction of bis(benzoylacetonato)dichlorovanadium(IV) with the trimethylsilyl derivative of 2- and 4-phenylphenols in carbon tetrachloride. The complexes have been characterized by physicochemical, magnetic moment measurements, IR, mass spectra, and electrochemical studies. The thermal behavior of the complexes has been studied by TGA–DTA. The complexes have been screened for their antimicrobial activity against some pathogenic bacteria, Escherichia coli and Staphylococcus aureus and fungi, Candida albicans, Aspergillus niger, and Fusarium oxysporum, by two-fold serial dilution.

Keywords:

• Non-oxovanadium(IV) complexes
• Biphenylphenols
• Antimicrobial activity
• Electrochemical study

Acknowledgments

M. Thakur is thankful to University Grants Commission, New Delhi, India, for providing financial assistance in the form of Junior Research Fellowship. Authors thank Department of Science and Technology (DST), Government of India, New Delhi, for providing financial assistance for FT-IR and UV-VIS spectrophotometer facility to the department under its FIST program. The authors wish to thank Sophisticated Analytical Instrument Facility, CDRI, Lucknow, India, for recording the mass spectra. The authors also thank the Sophisticated Analytical Instrument Facility, Punjab University, Chandigarh, for elemental analysis data and magnetic susceptibility measurements.

The authors thank the Department of Biosciences and Biotechnology, Himachal Pradesh University, Summer Hill, Shimla for carrying out the antimicrobial studies.