A uranium-potassium-organic framework solids:: Hydrothermal synthesis, structure, and property of K[(UO2)3(μ3-OH)3(μ2-OH)(C7H4O4N)2]OH

A novel 3D uranyl complex is reported as synthesized via hydrothermal treatment of uranium oxynitrate and p-nitrobenzoic acid. The structure of the complex is quite unusual. It consists of one-dimensional [(UO2)(3)(mu(3)-OH)(3)(mu(2)-OH) (C7H4O4N)(2)] ribbons along the b-axis. These ribbons are linked to form a two-dimensional layer structure by the potassium ion that serves to bridge between the two adjacent ribbons. p-Nitrobenzoic acids make the layers a three-dimensional architecture. The complex is studied by DSC-TGA in order to get more information about its thermal stability. (c) 2006 Elsevier B.V. All rights reserved.