Two Unprecedented Transition-Metal–Organic Frameworks Showing One Dimensional-Hexagonal Channel Open Network and Two-Dimensional Sheet Structures

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.