A Crown Ether as Template for Microporous and Nanostructured Uranium Compounds


  • This work was financially supported by DFG research grant to W.D. (De412/30-1) and Alexander von Humboldt Institutional Cooperation grant (to W.D. and S.V.K.). S.V.K. thanks Russian Ministry of Science and Education and RFBR for financial support (grants RNP and 06-03-32096, respectively).


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Highly porous uranyl compounds in which SO42− or SeO42− ions link adjacent U centers were prepared by using a crown ether as template. The uranyl sulfate (see picture; U- and S-centered polyhedra are yellow and green, respectively) has the lowest density so far reported for actinide oxide frameworks, while the uranyl selenate forms tubules that are separated by columns of [(H3O)@([18]crown-6)]+ complex cations.