1. Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, India
2. Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
3. Central NMR Facility and Physical/Material Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
4. School of Science and Technology, Nottingham Trent University, Clifton Lane, NG11 8NS Nottingham, United Kingdom