1. Department of Chemistry, Physical Chemistry Section , Visva-Bharati University , Birbhum , West Bengal , India
2. Department of Physics , Behala College, Parnashree , Kolkata , 700060 , West Bengal , India
3. Institute of Astronomy, Space and Earth Sciences , AJ 316, Salt Lake , Kolkata 700091 , India
4. Department of Chemistry , Seth AnandaramJaipuria College , 10, Raja Nabakrishna Street , Kolkata , 700005 , West Bengal , India