1. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering; Hunan University; Changsha 410082 Volksrepublik China
2. Department of Chemistry and Medicinal Chemistry Programme; National University of Singapore; Singapore 117543 Singapur
3. Laboratory of Bioimaging Probe Development, A*STAR; Singapur
4. Department of Chemistry; Stanford University; USA