1. Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur - 440010, India
2. Organic Chemistry Department, Indian Institute of Science, Bangalore - 560012, India
3. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560012, India
4. Department of Chemistry, Indian Institute of Technology Patna, Patna - 801103, India
5. Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Karlsruhe, Germany