1. Sauvage Center for Molecular Sciences Department of Chemistry Wuhan University Wuhan 430072 China
2. School of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637457 Singapore
3. Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 China
4. Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore