1. Department of ChemistryQuaid‐i‐Azam University Islamabad, 45320 Pakistan
2. Pakistan Academy of Sciences 3‐Constitution Avenue G‐5/2, Islamabad Pakistan
3. Chemistry DivisionPakistan Institute of Nuclear Science and Technology P.O. Nilore, Islamabad Pakistan
4. Department of ChemistryCollege of Science, University of Bahrain, 32038 Sakhir Bahrain
5. Department of Botany, University of Science and Technology Bannu Bannu Pakistan