1. Department of Chemistry, J. N. T. University, Ananthapuramu, A.P., India
2. Inorganic and Analytical Division, Department of Chemistry, S.V. University, Tirupati, A.P., India
3. Department of Science and Humanities, S. V. Engineering College, Tirupati, A.P., India
4. Department of Biochemistry, S.V. University, Tirupati, A.P., India.;
5. Department of Chemistry, J.N.T.U.A. College of Engineering, Kalikiri, A.P., India