Citation: Nolan E. Dean; Robert D. Hancock; Christopher L. Cahill; Mark Frisch (2008). Affinity of the Highly Preorganized Ligand PDA (1,10-Phenanthroline-2,9-dicarboxylic acid) for Large Metal Ions of Higher Charge. A Crystallographic and Thermodynamic Study of PDA Complexes of Thorium(IV) and the Uranyl(VI) ion. Inorganic Chemistry, 47, pp. 2000-2010.