1. Department of Chemistry, P. K. College, Contai, Purba Medinipur, West Bengal 721404, India
2. Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
3. Departamento de Química/CICEC, Universidade de Aveiro, Aveiro, 3810-193, Portugal
4. Department of Physics, Jadavpur University, Kolkata 700032, India
5. Department of Chemistry, HIT, Haldia 721657, India
6. Department of Chemistry, Government General Degree College, Keshiary 721135, West Bengal India
7. Department of Chemistry, Mugberia Gangadhar Mahavidyalaya, Purba Medinipur 721425, West Bengal, India
8. IICB, Kolkata 700032, India