1. 1Department of Chemistry, JNTUH College of Engineering, Hyderabad-500007, India 2Department of Chemistry, Maturi Venkata Suba Rao Engineering College, Hyderabad-501510, India
2. Department of Chemistry, Osmania University, Hyderabad-500007, India
3. Department of Chemistry, JNTUH College of Engineering, Hyderabad-500007, India