TransitionMetal coordination polymers with trans-1,4-cyclohexanedicarboxylate: Acidity-controlled synthesis, structures and properties

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Abstract

Five trans-1,4-cyclohexanedicarboxylate (chdc2-) metal-organic frameworks of transition metals were synthesized in aqueous systems. A careful control of pH, reaction temperature and solvent composition were shown to direct the crystallization of a particular compound. Isostructural [Co(H2O)4(chdc)]n (1) and [Fe(H2O)4(chdc)]n (2) consist of one-dimensional hydrogen-bonded chains. Compounds [Cd(H2O)(chdc)]n·0.5nCH3CN (3), [Mn4(H2O)3(chdc)4]n (4) and [Mn2(Hchdc)2(chdc)]n (5) possess three-dimensional framework structures. The compounds 1, 4 and 5 were further characterized by magnetochemical analysis, which reveals paramagnetic nature of these compounds. A presence of antiferromagnetic exchange at low temperatures is observed for 5 while the antiferromagnetic coupling in 4 is rather strong, even at ambient conditions. The thermal decompositions of 1, 4 and 5 were investigated and the obtained metal oxide (cubic Co3O4 and MnO) samples were analyzed by X-ray diffraction and scanning electron microscopy.

Original languageEnglish
Article number486
Number of pages16
JournalMaterials
Volume13
Issue number2
DOIs
Publication statusPublished - 19 Jan 2020

Keywords

  • Aliphatic ligands
  • Coordination polymers
  • Magnetochemical study
  • Metal oxides
  • Metal-organic frameworks
  • Synthesis
  • Thermolysis
  • coordination polymers
  • synthesis
  • MANGANESE(II)
  • metal oxides
  • DODECAHEDRA
  • MOFS
  • MAGNETIC-BEHAVIOR
  • metal-organic frameworks
  • aliphatic ligands
  • POROUS CO3O4
  • 2D
  • magnetochemical study
  • thermolysis
  • LIGAND
  • CHAINS
  • EXCHANGE
  • ORGANIC FRAMEWORKS

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