1. Department of Chemistry, Indian Institute of Technology (BHU), Varanasi, UP-221005, India
2. Department of Physics, Tamkang University, New Taipei City, Taiwan
3. Department of Chemistry, Indian Institute of Technology Hyderabad, Sangareddy, Telangana-502285, India
4. Department of Chemistry, Indian Institute of Technology Bombay, Powai, Maharashtra-400076, India