1. Dept. of Basic Science and Humanities, Dhanekula Institute of Engineering and Technology, Ganguru, Vijayawada - 521139, AP, India.
2. Department of Humanities and Sciences, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad. 500090, Telangana, India.
3. Dept. of Chemistry, V.R. Siddhartha Engineering College, Kanuru, Vijayawada - 520 007, AP, India.
4. Department of Chemistry, Govt. Degree College, Siddipet - 502103, Telangana (Dt), India.
5. Dept. of Chemistry, University College of Sciences, Acharya Nagarjuna University, Guntur - 522510, AP, India.