1. Department of Chemistry and Materials Science Program, University of New Hampshire, Durham, New Hampshire 03824, Department of Physics and Astronomy, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, Nevada 89154, Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, Nevada 89154, and Physics and Astronomy Department, Michigan State University, East Lansing, Michigan 48824-2320