Zhong-Jing Huang

Synthesis and crystal structures of supramolecular compounds: [Cu(mpca)2(H2O)] · 3H2O and [Cu2(mpca)2(pyr)4]

A new chelate ligand, 5-methyl-1H-pyrazole-3-carboxylic acid (mpca), has been synthesized. This ligand reacts with cupric sulfate to give two supramolecular compounds [Cu(mpca)2(H2O)] · 3H2O (1) and [Cu2(mpca)2(pyr)4] (Pyr = pyridine) (2), which were characterized by elemental analysis and X-ray crystal diffraction. Helical water chain and strong π–π interaction are important for the stability of the 3-D structure of these supramolecules.

Synthesis, crystal structures and properties of two Cd(II) complexes based on Zaltoprofen

Abstract Two metal-organic coordination complexes, [Cd(Zaltoprofen)(phen)]n (1) and [Cd(Zaltoprofen)(btz)]n (2) (where Zaltoprofen = 5-(1-carboxyethyl)-2-(phenylthio)phenylacetic acid, phen = 1,10-phenanthroline, btz = thiabendazole), have been synthesized by reaction of Cd(NO3)2 with Zaltoprofen, 1,10-phenanthroline or thiabendazole under hydrothermal conditions and characterized by single crystal X-ray diffraction, IR spectra, elemental analyses, powder X-ray diffraction (XRD), electronic spectra (UV-vis) and fluorescent properties. Compound 1 crystallizes in the monoclinic P21/c space group and 2 in the monoclinic system with space group P21/n. [Cd(Zaltoprofen)(phen)]n (1) features a 1-D zigzag chain. The zigzag chains are linked to form a 2-D layer through π–π stacking interactions. [Cd(Zaltoprofen)(btz)]n (2) displays a 2D net with alternately arranged left- and right-handed helical chains.

Poly[[μ(2)-aqua-μ(3)-(4-carb-oxy-2-propyl-1H-imidazole-5-carboxyl-ato-κN,O:O:O)-sodium] hemihydrate].

In the title compound, {[Na(C8H9N2O4)(H2O)]·0.5H2O}n, the Na+ ion is coordinated by two bridging water molecules, one N atom and three O atoms from three 4-carboxy-2-propyl-1H-imidazole-5-carboxylate (H2pimdc) ligands. Adjacent Na+ ions are linked alternately by two water O atoms and two carboxy O atoms into a chain along [001]. These chains are connected through the coordination of the carboxylate O atoms to the Na+ ions, forming a three-dimensional structure. An intramolecular O—H⋯O hydrogen bond and intermolecular N—H⋯O and O—H⋯O hydrogen bonds are present in the crystal structure.

Synthesis, Structures, and Properties of Two Zinc(II) and Cadmium(II) Supramolecular Complexes Based on Diphenic Acid

Two novel binuclear metal-organic coordination complexes [Zn2(dpa)2(phen)2(H2O)2] (1), [Cd2(dpa)2(btz)2(H2O)2] (2) (where H2dpa = diphenic acid, phen = 1,10-phenanthroline, btz = thiabendazole) have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, spectral method (IR), elemental analysis, and fluorescent properties. Compound 1 crystallizes in the triclinic P-1 space group while compound 2 in the monoclinic system with space group P2(1)/n. The binuclear cluster are stabilized by O‒HO hydrogen bond and further fitted together into 3-D supramolecular network by π–π stacking interactions and hydrogen bonds. The luminescence measurements reveal that two complexes exhibit strong fluorescent emissions in the solid state at room temperature.

Synthesis, Structures, Electrochemical Analysis, and Luminescence Properties of Four Supramolecular Complexes Based on Quinoline-2-carboxylic Acid

Four new coordination complexes with quinoline-2-carboxylate ion (quin-2-c),[Mn(quin-2-c)(H2O)3Cl]•H2O(1), Cd(quin-2-c)2(H2O)2(2), Co(quin-2-c)2(H2O)2 (3), Ni(quin-2-c)2(H2O)2 (4)(quin-2-c = quinoline-2-carboxylic acid ion), have been synthesized and characterized by IR and single crystal X-ray diffraction. Complex 1 and 3 forms 3-D structure vis hydrogen bonds and π–π contacts, and Complex 2 forms 2-D layers vis hydrogen bonds and π–π contacts. Complex 4 takes a 2-D hydrogen-bonding net structure. Complex 3 and 4 with the same coordination structure display different hydrogen bonds, which may suggest some connection between the radii of the metal ions and hydrogen bonds. Furthermore, the luminescence properties and electrochemical properties of 1 to 4 were studied. All this work may offer guidance for design of biological labels based on quinoline-2-carboxylic acid.

Synthesis, Crystal Structure, and Properties of Two Novel Complexes Based on Zaltoprofen Ligand

Two novel metal-organic coordination complexes [Cd(Zalto profen)2(H2O)3](H2O) (1), [Zn(Zaltoprofen)(H2O)]n (2) (where zaltoprofen = 5-(1-carboxyethyl)-2-(phenylthio)phenylacetic acid) have been synthesized under normal conditions and hydrothermal conditions, respectively. And characterized by single crystal X-ray diffraction, elemental analysis, spectral method (IR), powder X-ray diffraction (XRD), and fluorescent properties. Compound 1 crystallizes in the monoclinic Cc space group while compound 2 in the monoclinic system with space group P21 /c. [Cd(Zaltoprofen)2(H2O)3](H2O) (1) features 0-D structural, the hydrogen-bonds play a vital role in determining the crystal packing and construction of the extended 3-D supramolecular network. [Zn(Zaltoprofen)(H2O)]n (2) displays a 2D net with alternately arranged left- and right-handed helical chains. The O–H···O hydrogen bonding play an important role in stabilizing the structure. Supplemental materials are available for this article. Go to the publishers online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Hydrothermal synthesis, crystal structure, and properties of two novel binuclear complexes based on Zaltoprofen and 2,2′-bipyridine ligands

Two novel binuclear metal-organic coordination complexes [M2(Zaltoprofen)2(Bipy)2] [M = Cd (I), Zn (II); Zaltoprofen = 5-(1-carboxyethyl)-2-(phenylthio)phenylacetic acid, Bipy = 2,2′-bipyridine) have been synthesized under hydrothermal conditions and characterized by single crystal X-ray diffraction, elemental analysis, IR and electronic spectroscopy, powder X-ray diffraction, and fluorescent properties. Complexes I, II crystallize isomorphously in the monoclinic space group P21/c. Structural analysis shows that the M(II) atom of I and II is coordinated with four oxygen atoms from the carboxyl group of the Zaltoprofen together with two nitrogen atoms from the Bipy. The 3D structures of the complexes are stabilized by π-π stacking interactions.

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, crystal structure, and properties of cobalt, zinc, and manganese coordination polymers based on fluconazole

Three complexes based on fluconazole, namely, {[Co2(HFlu)(dpa)2(H2O)2]·H2O}n (1), {[Zn(HFlu)(IPA)]·H2O}n (2), and {[Mn(HFlu)2(IPA)(H2O)]·H2O}n (3) (HFlu = fluconazole, 2-(2,4-difluoro-phenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol; H2dpa = diphenic acid; H2IPA = isophthalic acid) have been synthesized. Single-crystal X-ray analysis revealed that 1 is a 2-D-network framework containing a trinuclear Co(II) unit, 2 is a 3-D framework, and 3 is 1-D double chain structure with a Mn2 metallocyclic core. The complexes have also been characterized by elemental analyses, IR, UV/vis and fluorescence spectroscopy, and thermal gravimetry. The phase purity of these polymers has been confirmed via powder X-ray diffraction. Graphical Abstract