1. Department
of Chemistry, National University of Singapore, 3 Science Drive 3,
Singapore 117543
2. Institute
of High Performance
Computing, Agency for Science, Research and Technology (A*STAR), 1 Fusionopolis Way, Singapore 138632
3. Division of Chemistry & Biological Chemistry, Nanyang Technological University SPMS-04-01, 21 Nanyang Avenue, SPMS-CBC-06-07, Singapore 637371