1. Nomadics, Inc., 1024 South Innovation Way, Stillwater, Oklahoma 74074, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemistry, University of Western Ontario, London, Ontario, Canada N6A 5B7, and Materials Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100, Lund, Sweden