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(μ3-OH)3(μ2-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.