Institution: | a Department of Chemistry, Abdul Wali Khan University, Mardan-23200, NWFP, Pakistan;b Institute of Chemical Sciences, University of Peshawar, Peshawar-25120, Pakistan;c University of Saskatchewan, Department of Chemistry, Saskatoon S7N 5C9, Canada;d HEJRIC, International Center for Chemical and Biological Sciences, University of Karachi, Karachi-75270, Pakistan |