1. Chemical Science and Engineering Division, Argonne
National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439,
Department of Chemistry and James Franck Institute, The University
of Chicago, 929 East 57th Street, Chicago, Illinois 60637, Department
of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, and X-ray Science Division, Advanced Photon Source,
Argonne National Laboratory, Argonne, Illinois 60439