1. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207
2. Department of Chemistry, National University of Singapore, Singapore 117543
3. Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585
4. Institute of Molecular Aggregation Science, Tianjin University, Tianjin 300072
5. Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072