1. Contribution from the U-60, Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, Department of Chemical Engineering, and Institute of Materials Science, University of Massachusetts, Amherst, Massachusetts 01003-3110, Department of Chemical Engineering, 159 Goessmann Laboratory, University of Massachusetts, Amherst, Massachusetts 01003-3110, and Los Alamos National Lab, Chemical Science and Technology Division, CST-DO, Los Alamos, New Mexico 87545