1. Department of Chemistry, CHRIST (Deemed to be University), Bangalore, Karnataka, India
2. Laboratoire de Physique et Chimie Théoriques UMR CNRS 7019 Université de Lorraine, Nancy, France
3. Department of Chemistry, Indian Institute of Technology, Ropar, Rupnagar 140001, Punjab, India
4. Analytical and Spectroscopy Division, ASCG/PCM, Vikram Sarabhai Space Centre, Indian Space Research Organization, Thiruvananthapuram - 695 022, Kerala, India