1. Center for Aggregation-Induced Emission; State Key Laboratory of Luminescent Materials and Devices; South China University of Technology; Guangzhou 510640 P.R. China
2. Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Science, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P.R. China
3. Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction; The Hong Kong University of Science & Technology, Kowloon; Hong Kong P.R. China