1. Department of Chemistry and Chemical Biology, Cornell University, Baker Laboratory, 162 Sciences Drive, Ithaca, NY 14853, USA
2. Department of Physics, Stanford University, Stanford, California 94305, USA
3. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
4. Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA
5. Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
6. Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, USA
7. Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76798, USA
8. Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA), Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062 Toulouse, France
9. Department of Chemistry, Trinity University, San Antonio, Texas 78212-7200, USA