1. Department of Organic Chemistry
2. School of Chemistry
3. Madurai Kamaraj University
4. Madurai-625 021
5. India
6. Department of Chemistry
7. College of Science
8. King Saud University
9. Riyadh 11451
10. Saudi Arabia
11. Department of Physics
12. University College of Engineering
13. Anna University Constituent College
14. Nagercoil 629 004