1. School of Applied Sciences and Humanities, National University of Technology, Islamabad, Pakistan
2. Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
3. Department of Chemistry, Govt. Post-graduate College Shakargarh, Shakargarh, Pakistan
4. Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
5. Chemistry Department, Rice University, Houston, Texas, USA