1. Department of Chemistry; University of Agriculture; Faisalabad 38040 Pakistan
2. Punjab Bio-energy Institute (PBI), University of Agriculture; Faisalabad 38040 Pakistan
3. Department of Chemistry; Umea University, Umea; 90187 Sweden
4. Sustainable Energy Technologies Center, College of Engineering, PO-Box 800, King Saud University; Riyadh 11421 Saudi Arabia
5. Department of Chemistry; COMSATS Institute of Information Technology Abbottabad; KPK 22060 Pakistan