title: Mixed-valent uranium(IV,VI) diphosphonate: synthesis, structure, and spectroscopy.
abstract: A mixed-valent uranium(IV,VI) diphosphonate, (H(3)O)(2)(UO(2))(3)U(H(2)O)(2)[CH(2)(PO(3))(2)](3)·6H(2)O (UC1P2S), has been synthesized under hydrothermal conditions. S-2-butanol was used to reduce uranium VI to IV. The tetravalent uranium centers adopt eight-coordinate geometries, while hexavalent uranyl units are all tetragonal bipyramids. The UV-vis-NIR spectrum of UC1P2S shows absorption features for both U(VI) and U(IV).
authors.affiliation: Department of Civil Engineering and Geological Sciences and Department of Chemistry and Biochemistry, 156 Fitzpatrick Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA.
authors.forename: Juan
authors.initials: J
authors.lastname: Diwu
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Albrecht-Schmitt