1. Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
3. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, P. R. China
4. Polymer Consultant, 523 Country Club Drive, Wilmington, Delaware 19803, United States
5. School of Chemistry and Chemical Engineering Nanjing University, Nanjing 210023, P. R. China