1. Department of Chemistry
2. Beijing Key Laboratory for Analytical Methods and Instrumentation
3. Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology
4. Tsinghua University
5. Beijing 100084
6. Institute of Materials Research and Engineering (A*STAR)
7. Singapore 117602
8. Department of Chemical and Biomolecular Engineering
9. National University of Singapore
10. Singapore 117585