Construction of a New 3D Zn(II) MOF with a mog Topology From 2-(Hydroxymethyl)-1H-imidazole-4,5-dicarboxylate.

Abstract: A new 3D Zn(II) MOF based on 2-(hydroxymethyl)-1H-imidazole-4,5-dicarboxylic acid (H₄hmIDC), formulated as {[Zn₃(HhmIDC)₂(H₂O)₂]·2H₂O}_n, has been successfully prepared under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy, as well as power X-ray diffraction. It is worth noting that the unique HhmIDC³⁻ ligand in the title compound adopts an unusual coordination mode, namely µ₄-kN,O: kN′,O′: kO″,O‴: kO′′′′ to link the Zn(II) ions into an interesting 3D coordination framework. Such a 3D network can be further simplified as a binodal 4-connected mog (moganite) topology with the Schläfli symbol of (4·6⁴·8)₂(4²·6²·8²). Moreover, the title Zn(II) MOF shows a relatively high thermal stability up to 340 °C, and exhibits an intense blue emission centered at 450 nm upon excitation at 370 nm.Graphical Abstract: A new 3D microporous Zn(II) MOF with an uncommon binodal 4-connected mog topology has been constructed from 2-(hydroxymethyl)-1H-imidazole-4,5-dicarboxylic acid (H₄hmIDC). Such a Zn(II) MOF displays a relatively high thermal stability and exhibits very strong blue photoluminescence with a maximum emission band at 450 nm when excited at 370 nm.<graphic></graphic> [ABSTRACT FROM AUTHOR]