1. Department of Chemistry, Assam University, Dargakona, Silchar-788011, Assam India
2. Department of Zoology, Charuchandra College, University of Calcutta, Kolkata-700029, West Bengal, India
3. Chemical Science Division Saha, Institute of Nuclear Physics, Kolkata-700064, West Bengal, India
4. Department of Physics, Assam University, Dargakona, Silchar-788011, Assam, India
5. Department of Pharmaceutical Technology, Jadavpur University, Kolkata-700032, West Bengal, India