1. Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA, USA
2. Department of Chemistry, University of Virginia, Charlottesville, VA, USA
3. Department of Chemistry, Keene State College, Keene, NH, USA
4. Department of Physics, Clark University, Worcester, MA, USA
5. School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand
6. Department of Chemistry, Washington State University, Pullman, WA, USA