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

A new 3D Zn(II) MOF based on 2-(hydroxymethyl)-1H-imidazole-4,5-dicarboxylic acid (H(4)hmIDC), formulated as {[Zn-3(HhmIDC)(2)(H2O)(2)]center dot 2H(2)O}(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 HhmIDC(3-) ligand in the title compound adopts an unusual coordination mode, namely A mu (4)-kN,O: kN',O': kOaEuro(3),OaEuro ': 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 Schlafli symbol of (4 center dot 6(4)center dot 8)(2)(4(2)center dot 6(2)center dot 8(2)). Moreover, the title Zn(II) MOF shows a relatively high thermal stability up to 340 A degrees C, and exhibits an intense blue emission centered at 450 nm upon excitation at 370 nm. 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 (H(4)hmIDC). 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. [GRAPHICS] .