1. College of Chemistry and Material Science
2. Hebei Normal University
3. Shijiazhuang 050024
4. China
5. Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science
6. Department of Chemistry
7. University of Leicester
8. University Road
9. Leicester LE1 7RH
10. UK
11. Institute of Chemistry
12. Chinese Academy of Sciences
13. Beijing 100190