1. Department of Chemistry; National Institute of Technology; Raipur 492010 Chhattisgarh India
2. Department of Chemistry; National Institute of Technology; Warangal 506004 Telangana India
3. Department of Chemistry, Nizam College; Osmania University; Hyderabad 500001 India
4. Department of Electronics & Telecommunication Engineering; NIT; Raipur 492010 India