1. Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli, TN, India;
2. Environmental Nanotechnology Division, Sri Paramakalyani Centre for Environmental Sciences, Manonmaniam Sundaranar University, Alwarkurichi, TN, India;
3. College of Chemistry and Chemical Engineering, Central South University, Changsha, P.R. China;
4. Department of Pharmacology, Saveetha Dental College and Hospitals, SIMATS, Chennai, TN, India