1. Contribution from the Department of Chemistry, University of Manchester, Oxford Road, Manchester, United Kingdom M13 9PL, Chemistry Department, Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973-5000, Laboratory of Chemical and Biological Dynamics, Center for Research on Molecular Electronics and Photonics, University of Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium, Optical Sciences Center, University of Arizona, Tucson, Arizona, 85721, and Departamento de Química Orgánica, ICMA...