1. College of Chemistry and Chemical Engineering Inner Mongolia Key Laboratory of Fine Organic Synthesis Inner Mongolia University Hohhot 010021 P. R. China
2. State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 P. R. China
3. School of Chemistry and Chemical Engineering University of South China Hengyang 421001 P. R. China
4. The Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology Clear Water Bay, Kowloon Hong Kong P. R. China
5. School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong Kong Shenzhen Guangdong 518172 P. R. China