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

Two new metal–organic frameworks, {[Co<sub>3</sub>(μ<sub>3</sub>-DMPhIDC)<sub>2</sub>(H<sub>2</sub>O)<sub>6</sub>]·2H<sub>2</sub>O}<sub><i>n</i></sub> (<b>1</b>) and {[Mn<sub>5</sub>(μ<sub>3</sub>-DMPhIDC)<sub>2</sub>(μ<sub>2</sub>-HDMPhIDC)<sub>2</sub>(Phen)<sub>5</sub>]·2CH<sub>3</sub>OH·3H<sub>2</sub>O}<sub><i>n</i></sub> (<b>2</b>) (H<sub>3</sub>DMPhIDC = 2-(3,4-dimethylphenyl)-1<i>H</i>-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 <b>1</b> is an enchanting three-dimensional network containing infinite one-dimensional-hexagonal channels and [Co<sub>2</sub>(DMPhIDC)]<sub>6</sub> cages, which have two interpenetrating nets topology. Polymer <b>2</b> exhibits a two-dimensional framework, which is composed of left- and right-handed helices pillared by Mn<sup>2+</sup> linkages. Antiferromagnetic coupling exists between the Co­(II) ions or Mn­(II) ions in <b>1</b> or <b>2</b>, respectively.