Cation-cation interactions between uranyl cations in a polar open-framework uranyl periodate |
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Authors: | Sullens Tyler A Jensen Rebecca A Shvareva Tatiana Y Albrecht-Schmitt Thomas E |
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Institution: | Department of Chemistry, Auburn University, 179 Chemistry Building, Auburn, Alabama 36849, USA. |
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Abstract: | Novel open-framework alkali metal uranyl periodates, having the formula A(UO2)3(HIO6)(OH)(O)(H2O)].1.5H2O (A = Li, Na, K, Rb, Cs), have been prepared through mild hydrothermal synthesis. These isostructural compounds contain distorted UO7 pentagonal bipyramids that are linked through a uranyl (UO22+) to uranyl cation-cation interaction. This interaction arises from a single axial uranyl oxygen coordinating at an equatorial site of an adjacent uranyl unit. These uranium oxide polyhedra are further bound by IO6 distorted octahedra creating an open-framework structure whose channels contain the alkali metal cations. |
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