1. Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284, Department of Chemistry, DePaul University, Chicago, Illinois 60614, Department of Chemistry, The University of Nebraska at Kearney, Kearney, Nebraska 68849, and Department of Chemistry, Lehigh Carbon Community College, Schnecksville, Pennsylvania 18078