1. Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 P.R. China
2. The University of Chinese Academy of Sciences Beijing 100039 P.R. China
3. Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics 510650 P.R. China
4. CAS Engineering Laboratory for Special Fine Chemicals 510650 P.R. China
5. CASH GCC (Nanxiong) Research Institute of New Materials Co., Ltd 512400 P.R. China