Construction of Metal−Organic Frameworks with Novel {Zn<sub>8</sub>O<sub>13</sub>} SBU or Chiral Channels through <i>in Situ</i> Ligand Reaction

By control of <i>in situ</i> ligand reaction, two zinc metal−organic frameworks (<b>1</b>, <b>2</b>) have been isolated hydrothermally. Both complexes are 3D open frameworks. Complex <b>1</b>, which is based on an unprecedented {Zn<sub>8</sub>O<sub>13</sub>} SBU constructed of 2<i>H</i>-imidazole-4,5-dicarboxylic acid (H<sub>3</sub>IMDC), has the same topology as that of MOF-5. Complex <b>2</b> contains large homochiral channels based on the <i>in situ</i> generated 4,5-di(1<i>H</i>-tetrazol-5-yl)-2<i>H</i>-imidazole (H<sub>3</sub>DTIM). Both H<sub>3</sub>IMDC and H<sub>3</sub>DTIM ligands are <i>in situ</i> generated from the same precursor, 2<i>H</i>-imidazole-4,5-dicarbonitrile.