Two Unprecedented Transition-Metal–Organic Frameworks Showing One Dimensional-Hexagonal Channel Open Network and Two-Dimensional Sheet Structures
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Two new metal–organic frameworks, {[Co3(μ3-DMPhIDC)2(H2O)6]·2H2O}n (1) and {[Mn5(μ3-DMPhIDC)2(μ2-HDMPhIDC)2(Phen)5]·2CH3OH·3H2O}n (2) (H3DMPhIDC = 2-(3,4-dimethylphenyl)-1H-imidazole-4,5-dicarboxylic acid, Phen = 1,10-phenanthroline), have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses, X-ray powder diffraction (XRPD), thermal analyses, and IR spectra. Polymer 1 is an enchanting three-dimensional network containing infinite one-dimensional-hexagonal channels and [Co2(DMPhIDC)]6 cages, which have two interpenetrating nets topology. Polymer 2 exhibits a two-dimensional framework, which is composed of left- and right-handed helices pillared by Mn2+ linkages. Antiferromagnetic coupling exists between the Co(II) ions or Mn(II) ions in 1 or 2, respectively.
