Structure and physical properties of Mn(II) and Co(II) complexes with multicarboxylate ligands

Three new metal-organic coordination polymers, [Mn(4,4′-bpy)(H2BTCA)(H2O)2](4,4′-bpy) (1), [Na2Co(BTCA)0.5(OXA)]·3H2O (2) and [Na2Co(BTCA)(H2O)2] (3), (H4BTCA = benzene-1,2,4,5-tetracarboxylic acid, H2OXA = oxalic acid) have been synthesized, which are characterized by elemental analysis, infrared spectrum and x-ray crystal diffraction. Complex 1 possesses a 3D polymeric structure, which is comprised of (4,4)-layers. Hydrogen bonds play a dominant role in the construction of the final 3D supramolecule. 1D channels are observed in complex 2, which can be ascribed to pillared-layer motifs.

A novel Co(II) complex with 1,2,4,5-benzenetetracarboxylate ligand, which contain 1D open channel along c-axis direction.Figure optionsDownload as PowerPoint slideHighlights
► Compound 1 is constructed from 2D (4,4) layers.
► Ellipse-like channels were observed along c-axis in complex 2.
► Complex 2 displays good gas sorption/desorption.