1. Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390 002, Gujarat, India
2. Department of Chemistry, Sardar Patel University, VV Nagar, Anand 388120, Gujarat, India
3. Department of Physics, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390002, Gujarat, India