1. Department of Chemistry, Jadavpur University, Kolkata - 700 032, India
2. Department of Chemistry, Aliah University, New Town, Kolkata - 700156, India
3. Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
4. Department of Chemistry, Mrinalini Dutta Mahavidyapith, Kolkata - 700051, India