1. Department of Chemistry, University of California, Irvine, California 92614, United States
2. Department of Physics and Astronomy, University of California, Irvine, California 92614, United States
3. Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
4. Department of Mathematics, Wayne State University, 656 W. Kirby, Detroit, Michigan 48202, United States