Wei-Man Tian

Synthesis, Structures and Properties of Two Metal-Organic Coordination Polymers Derived from Manganese(ΙΙ), Thiabendazole and Polydentate Carboxylic Acids

Two novel binuclear Mn(II) metal-organic coordination complexes [Mn2(TBZ)2(CDC)(C2O4)]n (1), {[Mn2(TBZ)2(BDC)0.5(BTC)(H2O)2]·ET}n (2), (where TBZ = thiabendazole, H2CDC = trans-1,4-cyclohexanedicarboxylic acid, H2C2O4 = oxalic acid, H3BTC = 1,3,5-benzenetricarboxylic acid, ET = ethanol, H2BDC = 1,4-benzenedicarboxylate) have been hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, electrochemical analysis and single crystal X-ray diffraction. The X-ray structure analysis reveals that 1 is s two-dimensional layer and 2 is s one-dimensional chain. In complex 1, it reveals 2-D layers composed of multi-(bidentate) bridging ligands (CDC and C2O4), and in 2, the coordinated BTC ligands adopt a monodentate mode and with BDC ligands adopt alternately chelating Mn1 and Mn2 bridges into 1-D chains. The 3-D structures of the two complexes are stabilized by π-π stacking interactions and hydrogen bonds.

Two Novel Benzenedicarboxylate-Metal Complexes: Synthesis, Crystal Structures, and Properties

Two new metal-organic frameworks, namely [Cd(3-NO2-bdc)(2,2′-bpy)(H2O)•H2O]2 (1) and[Ni(3-NO2-bdc)(4,4′-bpy)H2O]n (2) (where 3-NO2-bdcH2 = 3-nitro-1,2-benzenedicarboxylic acid, 2,2′-bpy = 2,2′-bipyridine, 4,4′-bpy = 4,4′-bipyridine), have been synthesized and structurally characterized. Complex 1 is a 0-dimensional (0D) framework, but face-to-face π-π stacking interactions and O–H···O hydrogen bonds extend these molecules into a 3D supramolecular framework. X-ray structure analysis reveals that complexes 2 exhibit a 2-dimensional (2D) network structure. Also, IR spectra, fluorescence properties, thermal decomposition process, and powder X-ray diffraction of the complexes were investigated.

Two novel four-coordinated zinc(II) polymers: Synthesis, structures, and properties

The synthsis, crystal structure, thermal analysis and spectroscopic studies of two novel zinc(II) coordination polymers Zn4(NA)4Dpa2 (I) and Zn(Inic)(Bpdc)0.5 (II) (NA = niacin, Inic = isonictinic acid, Dpa = 2,2′-biphenyldicarboxlate, Bpdc = 4,4′-biphenyldicarboxylate) are presented here. The crystal structure of I is a two-dimensional network whose tetranuclear unit is a slightly distorted square. Two kinds of ligand connect adjacent zinc(II) ions, respectively, in a coordinate direction. The structure of II is a three-dimensional and it consist of corrugated square layers of isonictinic acid-bridged zinc(II) ions which are pillared by 4,4′-biphenyldicarboxylate. The rod-ligands in II appear as useful tools to control the interlayer metal-metal separation. Each zinc(II) ion in I and II is four-coordinated with three oxygen atoms and one nitrogen atom building distorted tetrahedron environments.

Synthesis, Crystal Structure, and Properties of Two Zinc Tubular Coordination Polymers Based on Fluconazole

Two Zn(II)-containing complexes based on fluconazole, {[Zn(HFlu)2(IPA)]·9H2O}n (1), {[Zn(HFlu)2(OH-BDC)]·8H2O}n (2) (HFlu = fluconazole; 2-(2,4-difluoro- phenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol; H2IPA = isophthalic acid; OH-H2BDC = 5-hydroxyisophthalic acid) have been synthesized and structurally characterized. Complex 1 and 2 are both a one-dimensional (1D) tubular structure with the distorted dinuclear zinc rectangular-shaped cavity, and large free water molecules involved in strong O‒H···O and O‒H···N hydrogen bonds are accommodated in the 1D tubular structure. The thermal stabilities and photoluminescent properties of the coordination polymers have also been investigated.

A Novel Supramolecular Complex Based on Zaltoprofen Ligand: Synthesis, Crystal Structure, and Properties

A novel metal-organic supramolecular complex [Zn2 (Zaltoprofen)2(phen)2] (where Zaltoprofen = 5-(1-carboxyethyl)-2-(phenylthio)phenylacetic acid, phen = 1,10-phenanthroline) has been synthesized under hydrothermal condition and characterized by single crystal X-ray diffraction, elemental analysis, spectral method (IR), powder X-ray diffraction (XRD), electronic Spectra (UV-vis), and fluorescent properties. The compound crystallizes in the monoclinic P2(1)/c space group. [Zn2(Zaltoprofen)2(phen)2] features 0-D structural, the π–π stacking interactions and C‒H···O hydrogen-bonds play a vital role in determining the crystal packing and construction of the extended 3-D supramolecular network.

Synthesis, Structure and Properties of a 2D Cadmium(II) Coordination Polymer Based on Fluconazole and Isophthalate Ligands

A Cd(II) complex based on fluconazole and isophthalate ligands, {[Cd(HFlu)(IPA)(H2O)] · H2O}n (1), (HFlu=fluconazole; H2IPA=isophthalic acid) has been synthesized. Single-crystal X-ray analysis reveals that complex 1 has a 2D network structure including unusual triple hydrogen bonds between hydroxyl and triazolyl groups. The complex has also been characterized by IR, UV=Vis and fluorescence spectroscopy, elemental analysis, and thermogravimetry Graphical Abstract Synthesis, Structure and Properties of a 2D Cadmium(II) Coordination Polymer Based on Fluconazole and Isophthalate Ligands

Aquachloridobis[2-(1,3-thia­zol-4-yl-κN)-1H-benzimidazole-κN3]nickel(II) nitrate

In the title compound, [NiCl(C10H7N3S)2(H2O)]NO3, the NiII ion is coordinated by four N atoms from two chelating 2-(1,3-thiazol-4-yl)-1H-benzimidazole ligands, one Cl atom and one water molecule in a distorted octahedral geometry. In the crystal, O—H⋯O, N—H⋯O and N—H⋯Cl hydrogen bonds link the complex cations and nitrate anions into a three-dimensional network. π–π interactions between the thiazole and imidazole rings and between the thiazole and benzene rings are observed [centroid–centroid distances = 3.592 (3) and 3.735 (3) Å].