1. Chemical and Analytical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6375 (C.M.B.); Department of Chemistry, Franklin and Marshall College, Lancaster, Pennsylvania 17604 (K.R.H., A.L.Z.); Nuclear Materials Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (R.E.S.); and Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506-6045 (F.L.K.)