1. School of Chemistry, Cardiff University, Main Building, Park PL, Cardiff CF10 3AT, U.K.
2. Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
3. National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States
4. Recurve Inc., 4014 South Lemay Avenue, Unit 22, Fort Collins, Colorado 80525, United States