1. Beijing National laboratory for Molecular Sciences
2. Key Laboratory of Organic Solids
3. Institute of Chemistry
4. Chinese Academy of Sciences
5. Beijing 100190
6. Department of Chemistry
7. Tsinghua University
8. Beijing 100084
9. China
10. Cavendish Laboratory
11. Cambridge University
12. Cambridge CB3 0HE
13. UK
14. Beijing Normal University
15. Beijing 100875
16. National University of Singapore
17. Singapore