1. Department of Chemistry
2. School of Science
3. Beijing Jiaotong University
4. Beijing 100044
5. P. R. China
6. Beijing National Laboratory for Molecular Sciences
7. Key Laboratory of Organic Solids
8. Institute of Chemistry
9. Chinese Academy of Sciences
10. Beijing 100190
11. State Key Laboratory of Organic–Inorganic Composites
12. Beijing University of Chemical Technology
13. Beijing 100029