1. Beijing National Laboratory for Molecular Sciences (BNLMS)
2. State Key Laboratory of Rare Earth Materials Chemistry and Applications
3. College of Chemistry and Molecular Engineering
4. Peking University
5. Beijing 100871, P. R. China
6. Department of Materials Science and Engineering
7. University of Toronto
8. Toronto, Canada M5S 3E4
9. Shanghai Institute of Applied Physics
10. Chinese Academy of Sciences
11. Shanghai 201204, P. R. China
12. College of Chemistry and Chemical Engineering
13. Inner Mongolia University
14. Hohhot 010021, P. R. China