1. Department of ChemistryQuaid-i-Azam University Islamabad 45320 Pakistan
2. Department of ChemistryBaghdad-ul-Jadid CampusIslamia University of Bahawalpur Bahawalpur 63100 Pakistan
3. Department of Organic ChemistryArrhenius LaboratoryStockholm University, SE- 10691 Stockholm Sweden
4. Department of PhysicsUniversity of Sargodha Sargodha 40100 Pakistan
5. Department of ChemistryUniversity of Manchester, M13 9PL England