1. Department of Chemistry, University College of Science, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, India
2. Department of Chemistry, Prabhat Kumar College, Purba Medinipur 721404, West Bengal, India
3. Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
4. Departamento de Química-Física, Escuela de Química, Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá, Panama 0824, Panama
5. Institute for Quantum Materials and Technology (IQMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen D-76344, Germany
6. Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe D-76131, Germany