1. Department of Chemistry, University of Kalyani, Nadia, India
2. Division of Microbiology, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India
3. School of Chemistry, University of St Andrews, Fife, UK
4. Department of Physics, Behala College, Kolkata, India
5. Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University, Mainz, Germany