1. Guangzhou Institute of Chemistry Chinese Academy of Sciences Guangzhou 510650 P.R. China
2. Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics Guangzhou 510650 P.R. China
3. CAS Engineering Laboratory for Special Fine Chemicals Guangzhou 510650 P.R. China
4. University of Chinese Academy of Sciences Beijing 10049 P.R. China
5. Department of Chemistry City University of Hong Kong Hong Kong
6. CASH GCC (Nanxiong) Research Institute of New Materials Co., Ltd Guangzhou 510650 P.R. China