1. a Department of Chemistry , Jamia Millia Islamia (Central University) , New Delhi , India
2. b Department of Chemistry, Faculty of Science , Universiti Teknologi Malaysia , Johor Bahru , Johor , Malaysia
3. c Ibnu Sina Institute for Fundamental Science Studies, Nanotechnology Reseach Alliance , Universiti Teknologi Malaysia , Johor Bahru , Johor , Malaysia
4. d Department of Pharmaceutical and Medicinal Chemistry , Pharmaceutical and Drug Industries Research Division, National Research Centre , Dokki , Cairo , Egypt