Influence of reaction temperature and stoichiometry on the coordination mode of a multidentate pyridylpyrazole ligand in Co(ii) complexes: from a 0D mononuclear structure to 3D frameworks

Three Co(ii) coordination polymers with different dimensionality have been successfully constructed under controlled conditions by changing the reaction temperature and stoichiometry.

Five Co(ii) coordination polymers with different counter anions based on [3,5-di(4H-1,2,4-triazol-4-yl)benzoato]− ligand: directed synthesis, structures and magnetic properties

Five cobalt(ii) coordination polymers were synthesized by reactions of HL with varied cobalt(ii) salts and different templates under solvothermal conditions.

Syntheses, topological structures and properties of six metal–organic frameworks constructed from a flexible tetracarboxylate ligand

Six new metal–organic frameworks (MOFs), Co₂O(odip)(py)₂(DMSO)₂·3H₂O (1), Co₂(odip)(H₂O)(DMA)₂·2DMA (2), Co₄(odip)₂(H₂O)₄(DMSO)₂·5DMSO (3), [Zn₂(odip)(DMF)₂(H₂O)]·2DMF·2H₂O (4), Zn₂(odip)(H₂O) (5) and In(odip)·3ACN (6), have been synthesized from the 5,5′-oxydiisophthalic acid (H₄odip) ligand under solvothermal conditions.

Syntheses, structures, and properties of six cobalt(ii) complexes based on a tripodal tris(4-(1H-1,2,4-triazol-1-yl)phenyl)amine ligand

Six new cobalt(ii) metal–organic frameworks based on the tripodal tris(4-(1H-1,2,4-triazol-1-yl)phenyl)amine (TTPA) ligand with different aromatic carboxylate auxiliary ligands have been synthesized and structurally characterized in detail. All the complexes show optical semiconductive properties.

Two NiII Complexes with Interesting Topologies Constructed from 5-Aminoisophthalic Acid with Rigid Bis(imidazole) Ligands

Two new NiII complexes, [Ni2(AIP)2(bib)1.5]·4H2O (1) and [Ni(AIP)(bibp)(H2O)]·H2O (2) (AIP = 5-aminoisophthalic acid, bib = 1,4-bis(1-imidazolyl)benzene and bibp = 4,4′-bis(1-imidazolyl)biphenyl), have been synthesised hydrothermally and characterised by IR, elemental, single-crystal X-ray diffraction, and powder X-ray diffraction analyses. Topology analysis reveals that complex 1 is a 2D bilayer network, containing a new tetranodal (3,3,4,5)-connected (63)2(65·8)(68·82) configuration. Complex 2 exhibits a 2D→3D inclined polycatenate framework based on the 2D 44-sql net. In addition, the thermal stability of the two complexes was also studied.

Syntheses, Photoluminescent Properties, and Structural Investigation of Five Complexes based on a New T-Shaped 2-(Pyridin-3-yl)-4,6-Pyrimidine Dicarboxylic Acid Ligand: Structure Evolution from One-dimensional Chains to Three-dimensional Architectures

A series of structurally diverse coordination polymers, [Mn(ppmdc)(H2O)2]n (1), [Cu(ppmdc)(H2O)2]n (2), {[Co(ppmdc)][Co(ppmdc)(H2O)]}n (3), [Zn(ppmdc)(H2O)]n (4), and [Cd(ppmdc)]n (5) (H2ppmdc = 2-(pyridin-3-yl)-4,6-pyrimidine dicarboxylic acid) were obtained from metal salts and H2ppmdc under hydrothermal conditions. Single crystal X-ray structural analysis reveals that complexes 1–5 have different structures, ranging from one- to three-dimensions, which are mainly due to the different metal ions, and especially the coordination mode of the H2ppmdc ligand. Complexes 1 and 2 are 1D coordination polymers, in which the ppmdc2– ligand adopts a bis-(bidentate) mode to link metal ions. Complexes 3 and 4 feature a 2D metal-organic framework with Schläfli topologies of (4.62) (42.62.82) and (4.82), respectively, in which the metal ions are bridged by μ3-ppmdc2– ligands. Complex 5 possesses a 3D nanotubular metal-organic framework with a point symbol of (49.66) topology built up from the 6-connected ppmdc2– ligands and Cd(ii) ions. The thermal properties of complexes 1–5 have been determined. Moreover, investigation of photoluminescent properties reveals that the configuration of ppmdc2– resulting from metal-directed coordination has a profound effect on the fluorescence emissions of complexes 4 and 5.