1. Department
of Chemistry, Aliah University, New Town, Kolkata 700
156, India
2. Chemistry
and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore 560 064, India
3. Department
of Chemistry, Jadavpur University, Jadavpur, Kolkata 700
032, India
4. Department
of Chemistry, R. K. M. Residential College, Narendrapur, Kolkata 700
103, India
5. Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117 543, Singapore