1. 1JNTUA, Ananthapuramu, A.P, India .
2. 2Department of Chemistry, Sri Kalahasteewara Institute of Technology, Srikalahasti, Chittoor Dist, A.P, India. Affiliated to Jawaharlal Nehru Technological University Anantapur, Ananthapuramu A.P, India .
3. 3Department of Chemistry, JNTUA College of Engineering, Ananthapuramu, Constituent College of Jawaharlal Nehru Technological University Anantapur, Ananthapuramu. A.P, India.