Actinide-SAMMS™
Hexagonal bipyramidal geometry of the complex formed between 3,2-HOPO and the NpO2 cation (looking down the O=Np=O bond). The brown atom in the center is Np, and the red atoms surrounding it are O atoms. The pair of bidentate 3,2-HOPO ligands (top and bottom) are strongly hydrogen bound to the monodentate 3,2-HOPO ligand (left). The remaining equatorial coordination site is filled by a water molecule (on the right).
Whether preventing uranium leaching from mine tailings, facilitating the recycling of spent nuclear fuel from the nuclear power industry, or stabilizing legacy waste from 40 years of weapons grade plutonium production, actinide SAMMS™ can contribute to a cleaner environment. Several different 'flavors' of actinide SAMMS™ have been developed and found to be effective for these separations/immobilizations, such as the Ac-Phos, Glycinyl-urea and HOPO ligands. For more details, please see the literature citations at the bottom of the page.
Supporting Publications
"Actinide Sequestration Using Self-Assembled Monolayers on Mesoporous Supports (SAMMS™)", Glen E. Fryxell, Yuehe Lin, Sandy Fiskum, Jerome C. Birnbaum, Hong Wu, Ken Kemner and Shelley Kelly, Env. Sci. &Tech. 2005, 39, 1324-1331.
"Incorporation of Hydroxypyridinone (HOPO) Ligands into Self-Assembled Monolayers on Mesoporous Supports (SAMMS™) for Selective Actinide Sequestration", Yuehe Lin, Sandra K Fiskum, Wassana Yantasee, Hong Wu, Shas V. Mattigod, Glen E. Fryxell, Kenneth N. Raymond, Jide Xu, Env. Sci. &Tech. 2005, 39, 1332-1337.