1. Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Singapore
2. The Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island 627833, Singapore
3. Food, Chemical and Biotechnology Cluster, Singapore Institute of Technology, 10 Dover Drive, Singapore 138683, Singapore