1. Department of Chemical Sciences
2. School of Basic and Applied Sciences
3. Central University of Punjab
4. Bathinda 151 001
5. India
6. School of Chemistry and Physics
7. University of KwaZulu Natal
8. Durban 4000
9. South Africa
10. Department of Chemistry
11. National Dong Hwa University
12. Hualien
13. Taiwan 97401