1. Department of Applied Science Haldia Institute of Technology Haldia West Bengal 721657 India
2. Department of Chemistry Jadavpur University Kolkata West Bengal 700032 India
3. Department of Chemistry Utkal University Vani Vihar Bhubaneswar Odisha 751004 India
4. Dipartimento di Scienze Chimiche e Farmaceutiche, Centro di Strutturistica Diffrattometrica Universita' di Ferrara Via L.Borsari, 46 Italy
5. Department of Chemistry King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia