1. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological SciencesUniversity of Karachi Karachi 74200 Pakistan
2. Pharmaceutical Sciences Department, College of Pharmacy and Health SciencesUniversity of Sciences and Technology of Al Fujairah Fujairah 2202 UAE
3. Department of PharmaceuticsUniversity of Khartoum Khartoum, 11111 Sudan
4. Deparment of ChemistryUniversity of Karachi Karachi 74200 Pakistan
5. National Centre of Excellence in Physical ChemistryUniversity of Peshawar Peshawar 25120 Pakistan