1. Department of Chemistry Allama Iqbal Open University Islamabad Islamabad 44000 Pakistan
2. School of Chemistry University of the Punjab Lahore P.O. box 54590 Pakistan
3. Institute of Polymer and Textile Engineering and Technology University of the Punjab Lahore P.O. box 54590 Pakistan
4. Department of Chemistry The University of Lahore Lahore 54000 Pakistan
5. Interdisciplinary Research Center for Advanced Materials King Fahd University of Petroleum and Minerals (KFUPM) Dhahran 31261 Saudi Arabia
6. School of Life Science and Food Engineering Huaiyin Institute of Technology Huai'an 223003 China