1. Department of Chemistry, University of Agriculture, Faisalabad 38000, Pakistan
2. Department of Physics, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
3. Department of Chemistry, COMSAT University, Abbottabad Campus, KPK, Islamabad 22060, Pakistan
4. Punjab Bio-energy Institute, University of Agriculture, Faisalabad 38000, Pakistan