1. Biomedical Division, State Key Laboratory of Luminescent Materials and Devices, College of Materials Science and Engineering South China University of Technology 381 Wushan Road Guangzhou 510640 China
2. School of Chemistry, Chemical Engineering and Biotechnology Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
3. State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences Guangxi Normal University Guilin 541004 China