1. Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, National High Magnetic Field Laboratory, Tallahassee, Florida 32310, Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, Albemarle Corporation, P.O. Box 14799, Baton Rouge, Louisiana 70898, and Department of Physics & Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803