1. Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
2. NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, University Hall, Tan Chin Tuan Wing Level 04, #04-02, 21 Lower Kent Ridge Road, 119077 Singapore
3. School of Chemical Engineering and Technology, Xi’an Jiaotong University, 28 Xianning West Road, Beilin, Xi’an 71004, Shanxi, China