1. Department of Chemistry Government College University of Lahore Lahore 54000 Pakistan
2. Faculty of Sciences Department of Chemistry Sialkot University Sialkot 51040 Pakistan
3. School of Chemistry and Chemical Engineering Linyi University Linyi 276000 P. R. China
4. School of Biochemistry and Biotechnology University of the Punjab 54590 Lahore Pakistan
5. Institute of Chemistry The Islamia University of Bahawalpur Bahawalpur 63000 Pakistan
6. Computational Institute for Molecular Materials School of Chemical Engineering Nanjing University of Science and Technology Nan Jing Shi 210094 P. R. China
7. Fachbereich Chemie Institut für Organische Chemie Universität Hamburg Martin-Luther-King-Platz 6 20146 Hamburg Germany