Microwave Assisted Synthesis and Antioxidant Activity of Vanadium(IV) Complexes of Amino Acid Schiff Bases

Abstract

Synthesis of some amino acid Schiff base complexes of vanadium(IV) was done using microwave mode of synthesis and aqueous/semiaqueous medium as solvent. Complexes were characterized by using common analytical and spectroscopic tools such as IR, ¹H NMR, EI Mass, ESR, and magnetic susceptibility measurements. Single-crystal X-ray analysis of one of the complexes was carried out. Antioxidant activity of the complexes was studied using the DPPH scavenging method. The present work attempts to establish a possible structure and antioxidant activity correlation of the synthesized complexes. Some of the complexes show comparable activity to that of the standard reference (i.e., ascorbic acid).

Keywords:

• amino acid Schiff base
• antioxidant activity
• DPPH scavenging
• microwave assisted synthesis
• single crystal
• vanadium(IV) complexes

Acknowledgments

The authors are thankful to the Head, Department of Chemistry, RTM Nagpur University, for providing necessary laboratory facilities. The authors are also thankful to SAIF, Punjab University, Chandigarh; SAIF, IIT Bombay, Mumbai; and IISc., Bangalore for providing facilities of the spectral study. Sachin S. Wazalwar is thankful to the Principal, RCERT, Chandrapur for his support and encouragement for this research.