1. Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
2. Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, Nadia, India
3. Institut für Anorganische
Chemie, Georg-August-Universität Göttingen, Tammannstraße
4, 37077 Göttingen, Germany
4. Department of Physics, Mugberia G. Mahavidyalaya, Bhupatinagar, Purba Medinipur 721425, India