1. Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, U.S.A. (G.C., J.R.P.); Department of Chemistry, Beijing Normal University, Beijing 100875, China (S.W.); and Transuranium Research Laboratory (Chemical and Analytical Sciences Division), Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6375, U.S.A. (R.G.H., J.R.P.)