1. Department of Chemistry, Abdul Wali Khan University Mardan, Pakistan;
2. Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan;
3. Department of Physics, University of Sargodha, Sargodha, Pakistan;
4. Department of Chemistry, Kohat University of Science & Technology, Kohat, Pakistan;
5. Department of Biochemistry, Abdul Wali Khan University Mardan, Mardan, Pakistan