1. Department of Chemistry; University of Calcutta; 92 APC Road Kolkata 700009 India
2. Department of Chemistry; Dr. Bhupendra Nath Dutta Smriti Mahavidyalaya; Burdwan 713407 West Bengal India
3. Department of Biophysics, Molecular Biology and Bioinformatics; University of Calcutta; 92 APC Road Kolkata 700009 India