1. Chengdu Institute of Organic Chemistry
2. Chinese Academy of Sciences
3. Chengdu 610041
4. P. R. China
5. Institute for Technical and Macromolecular Chemistry
6. University of Hamburg
7. 20146 Hamburg
8. Germany
9. Polymer Research Institute
10. State Key Laboratory of Polymer Materials Engineering
11. Sichuan University
12. Chengdu 610065