A twofold interpenetrating two-dimensional zinc(II) coordination polymer: synthesis, crystal structure and physical properties

A new three-dimensional cadmium(II) coordination polymer based on bis[4-(2-methylimidazol-1-yl)phenyl]methanone: synthesis, structure and properties

A novel three-dimensional CdII coordination polymer, namely, poly[[(μ3-benzene-1,4-diacetato)(μ2-benzene-1,4-diacetato)bis{μ2-bis[4-(2-methylimidazol-1-yl)phenyl]methanone}dicadmium(II)] tetartohydrate], {[Cd(C10H8O4)(C21H18N4O)]·0.25H2O} n or {[Cd(PBEA)(MIPMO)]·0.25H2O} n , (I), was synthesized by the hydrothermal method using benzene-1,4-diacetic acid (H2PBEA), bis[4-(2-methylimidazol-1-yl)phenyl]methanone (MIPMO) and Cd(NO3)2·6H2O. The title compound was structurally characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy and thermogravimetric analysis, and exhibits a three-dimensional pillar–layer framework based on CdII–PBEA layers and MIPMO pillars, which can be simplified into a pcu topological network. The title compound displays a highly selective and sensitive sensing for Fe3+ ions in aqueous solution. In addition, it displays a high photocatalytic activity for the degradation of methylene blue (MB) in water under UV light irradiation.

catena-Poly[[bis(1H-indole-5-carboxylato-κ2 O,O′)zinc(II)]-μ-4,4′-azobipyridine-κ2 N 1:N 1′]

The asymmetric unit of the title coordination polymer [Zn(C₉H₆NO₂)₂(C₁₀H₈N₄)]_n, consists of one Zn^II cation, one bidentate 1H-indole-5-carboxyl­ate (I5C) anion and half of a 4,4′-azobi­pyridine (Abpy) neutral ligand. The coordination polymer is stabilized by a combination of N—H⋯O and C—H⋯π inter­actions, which leads to the formation of wave-like two-dimensional coordination polymeric layers.

The asymmetric unit of the title coordination polymer [Zn(C₉H₆NO₂)₂(C₁₀H₈N₄)]_n, consists of one Zn^II cation, one bidentate 1H-indole-5-carboxyl­ate (I5C) anion and half of a 4,4′-azobi­pyridine (Abpy) neutral ligand. In the coordination polyhedron, the Zn^II ion adopts a distorted octa­hedral geometry. The coordination polymer is stabilized by a combination of N—H⋯O and C—H⋯π inter­actions, which leads to the formation of wave-like two-dimensional coordination polymeric layers.