1. Department of Physical Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, West Bengal 700 032, India
2. St. Xavier’s College, 30 Mother Teresa Sarani, Kolkata, West Bengal 700 016, India
3. Department of Chemistry, University of Calcutta, Kolkata 700 009, India