1. School of Chemistry, University of the Punjab, New Campus, Lahore 54590, Pakistan
2. Department of Chemistry of The College of Staten Island, PhD Program in Chemistry of The Graduate Centre, The City University of New York, 2800 Victory Boulevard, Staten Island, NY 10314, USA
3. Department of Chemistry, College of Science, King Khalid University, P. O. Box 9004, Abha 61413, Saudi Arabia
4. Department of Physics, College of Science, University of Bisha, P. O. Box 551, Bisha, 61922, Saudi Arabia