1. Department of Chemistry, Aliah University, New Town, Kolkata 700 160, India
2. Department of Physics, Jadavpur University, Jadavpur, Kolkata 700 032, India
3. Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
4. Department of Chemistry, IIT Bhilai, Sejbahar, Raipur, Chhattisgarh 492015, India