1. Department of Chemistry, Jadavpur University, Kolkata, West Bengal 700 032, India
2. Department of Biochemistry, University of Lausanne, Ch. des Boveresses 155, Epalinges 1066, Switzerland
3. Department of Chemistry, Gurudas College, Narkeldanga, Kolkata, West Bengal 700 054, India
4. Vice-Chancellor, Aliah University, ll-A/27, Action Area II, Newtown, Kolkata, West Bengal 700 160, India