1. Department of Chemistry
2. University of Calcutta
3. Kolkata 700009
4. India
5. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
6. School of Chemistry and Chemical Engineering
7. Sun Yat-SenUniversity
8. Guangzhou 510275
9. P. R. China
10. Institutfuer Physikalische und Theoretische Chemie
11. Technische Universitaet Graz
12. A-8010 Graz
13. Austria