1. Key Laboratory of Theoretical Chemistry of Environment
2. Ministry of Education
3. School of Chemistry
4. South China Normal University
5. Guangzhou 510006
6. College of Chemistry and Chemical Engineering
7. Henan University
8. Kaifeng 475001
9. P. R. China
10. Department of Physics
11. K.S. Rangasamy College of Arts and Science (Autonomous)
12. Tiruchengode 637215
13. India
14. Periyar University
15. Salem