1. Department of Chemistry, Tamralipta Mahavidyalaya, Tamluk 721636, West Bengal, India
2. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India
3. Department de Quimica, Universitat de les Illes Balears, Cra. de Valldemossa km 7.5, Palma de Mallorca (Baleares) 07122, Spain