1. Department of Chemistry, Government College University, Faisalabad, Pakistan;
2. Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan;
3. Laboratoire de caractérisation photophysique des matériaux conjugués, Département de Chimie, Pavillon JA Bombardier, Université de Montréal, Montréal, Canada;
4. Interdisciplinary Research Center in Biomedical Materials, COMSATS Institute of Information Technology, Lahore, Pakistan