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Abstract: A three-dimensional La(III) based metal-organic framework, La2[NC5H3(CO2)2]3·3H2O, was assembled using the aromatic linker 3,5-pyridinedicarboxylate. This new compound was synthesized hydrothermally and is an unusual example of a lanthanum containing metal-organic network. The compound contains two distinct La centers, each adopting a nine-coordinate geometry. The structure is built up from zig-zag chains that link via bridging water molecules into a double chain defining edge-sharing six rings. These double chains are arranged into layers and connect through 3,5-pyridinedicarboxylate ligands to give the extended 3-D coordination framework. The material is thermally stable to ca. 360°C and transforms to an unknown compound before finally decomposing to phase-pure La2O3 at 800°C. The synthesis, structure, morphology and properties of the new material are described. [Copyright &y& Elsevier]

Abstract: A three-dimensional Bi(III) based metal–organic framework was synthesized under hydrothermal conditions using the multidentate organic linker 3,5-pyridinedicarboxylate. Bismuth oxide 3,5-pyridinedicarboxylate, Bi2O2[NC5H3(CO2)2], contains embedded 1-D cationic bismuth oxide chains that propagate along the crystallographic c-axis. The oxygens of the Bi2O2 core are three-coordinate and bond strongly to the Bi atoms. Thermogravimetric analysis shows that the material possesses high thermal stability up ca. 400°C before decomposing to phase-pure Bi2O3 at 800°C. The structure, crystallinity, morphology and properties of the material are discussed. [Copyright &y& Elsevier]

Abstract: A three-dimensional strontium-based metal-organic framework was constructed using 1,3,5-benzenetricarboxylic acid, [Sr3((OOC)3C6H3)2(H2O)4]·H2O. This new compound was synthesized hydrothermally and is a rare example of a strontium metal-organic network. The compound network contains three distinct Sr centers, one of which is seven-coordinate and the other two are nine-coordinate geometry. The benzene rings form a herring-bone type of arrangement down the a-axis. The material is thermally stable to ca. 230°C and transforms to an unknown material before finally decomposing to phase-pure SrCO3 at 650°C. The synthesis, structure, morphology and materials properties are discussed. [Copyright &y& Elsevier]