1. Department of Chemistry, Stanford University, Stanford, California 94305, United States
2. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
3. Department of Chemistry, University of California, Irvine, California 92697, United States
4. ESRF-The European Synchrotron Radiation Facility, 71 Avenue des Martyrs, Grenoble 38000, France
5. Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
6. The University of Manchester at Harwell, Diamond Light Source, Harwell Campus, Didcot OX11 0DE, U.K.