1. Department of Chemistry, National Institute of Technology Meghalaya, Shillong, Meghalaya, India
2. New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
3. School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
4. CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India