Mixed-valent uranium(IV,VI) diphosphonate: synthesis, structure, and spectroscopy

Juan Diwu; Thomas E Albrecht-Schmitt

doi:10.1021/ic300391p

Mixed-valent uranium(IV,VI) diphosphonate: synthesis, structure, and spectroscopy

Inorg Chem. 2012 Apr 16;51(8):4432-4. doi: 10.1021/ic300391p. Epub 2012 Mar 29.

Authors

Juan Diwu¹, Thomas E Albrecht-Schmitt

Affiliation

¹ 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.

PMID: 22458387
DOI: 10.1021/ic300391p

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).