Use of 2,2-Bipyrimidine for the Preparation of UO22+-3d Diphosphonates

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• 作者：Pius O. Adelani ; Nathaniel D. Cook ; Peter C. Burns
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：November 5, 2014
• 年：2014
• 卷：14
• 期：11
• 页码：5692-5699
• 全文大小：500K
• ISSN：1528-7505

文摘

Three new multidimensional bimetallic UO₂²⁺-3d three-dimensional complexes were crystallized in high yield under mild hydrothermal conditions: [Mn(H₂O)]₂[(UO₂)₄(PO₃C₆H₄PO₃)₃(bipym)]路2H₂O (1), [Ni(H₂O)]₂[(UO₂)₃(O₃PC₆H₄PO₃)(O₃PC₆H₄PO₃H)₂(bipym)]路6H₂O (2), and Zn[(UO₂)(HO₃PC₆H₄PO₃)(HO₃PC₆H₄PO₃H)_0.5(bipym)_0.5] (3), where bipym = 2,2-bipyrimidine. The structure of 1 is composed of edge-sharing dimers of uranyl pentagonal bipyramids that are linked by rigid phenyl spacers to form pillared three-dimensional networks. This compound is remarkable in that the [Mn₂(H₂O)₂(bipym)]⁴⁺ moiety is incorporated within the uranyl phosphonate frameworks without reducing the dimensionality of the overall structure. Compound 2 consists of uranyl tetragonal and pentagonal bipyramids that are linked by phosphonate groups to form a pillared three-dimensional framework with channels that are occupied by the [Ni₂(H₂O)₂(bipym)₂]⁴⁺ moiety. In compound 3, edge-sharing dimers of uranyl pentagonal bipyramids are connected through the phosphonate ligand to create corrugated uranyl-phosphonate chains. The incorporated [Zn₂(bipym)]⁴⁺ subunits are located within the interlayer of the uranyl-phosphonate chains. All three compounds are characterized by absorption, fluorescence, and infrared spectroscopy.