H2bipy]2[(UO2)6Zn2(PO3OH)4(PO4)4].H2O: an open-framework uranyl zinc phosphate templated by diprotonated 4,4'-bipyridyl

Inorganic Chemistry
Yaqin YuThomas E Albrecht-Schmitt

Abstract

Under mild hydrothermal conditions, a new organically templated uranyl zinc phosphate, [H 2bipy] 2[(UO 2) 6Zn 2(PO 3OH) 4(PO 4) 4].H 2O ( UZnP-2), has been synthesized. Structural analysis reveals that UZnP-2 is constructed from UO 7 pentagonal bipyramids that are linked into edge-sharing dimers that are in turn joined together by ZnO 4 and PO 4 tetrahedra to form a three-dimensional network. Intersecting channels occur along the a, b, and c axes. These channels house the diprotonated 4,4'-bipyridyl cations and water molecules. Ion-exchange experiments demonstrate that replacement of the 4,4'-bipyridyl cations by alkali and alkaline-earth metal cations results in a rearrangement of the framework. Further characterization of UZnP-2 is provided by Raman and fluorescence spectroscopy. The latter method reveals strong emission from the uranyl moieties with characteristic fine structure.

References

Jan 1, 1995·Acta Crystallographica. Section A, Foundations of Crystallography·R H Blessing
Sep 21, 2002·Chemical Communications : Chem Comm·J A DanisB Eichhorn
Mar 17, 2004·Inorganic Chemistry·Peter C BurnsAndrew J Locock
Oct 10, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Mark Frisch, Christopher L Cahill
Nov 6, 2007·Inorganic Chemistry·Yaqin YuThomas E Albrecht-Schmitt

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Citations

Mar 31, 2009·Inorganic Chemistry·Pius O Adelani, Thomas E Albrecht-Schmitt

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