- Design and characterization of a polarized coordination polymer of a zinc(II) biphenyldicarboxylate bearing a sulfone group
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A novel coordination polymer of zinc(II) biphenyldicarboxylate bearing a sulfone group, [Zn(sbdc)(H2O)3]·(H2sbdc)· H 2O (H2sbdc: sulfone biphenyldicarboxylic acid), has been synthesized. It is composed of a one-dimensional chain structure of alternating Zn(II) cations and sbdc anions. This coordination polymer possesses noncoordinating uncharged acid H2sbdc existing between the chains with hydrogen-bonding networks. The proton conductivity of [Zn(sbdc)(H 2O)3]· (H2sbdc) · H2O strongly depended on the relative humidity (RH), being 2.5 x 10-7 S cm-1 at 95% RH. The activation energy for proton conductivity was estimated to be 0.32 eV at 95% RH.
- Kanaizuka, Katsuhiko,Iwakiri, Shoji,Yamada, Teppei,Kitagawa, Hiroshi
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- A new anionic metal-organic framework based on tetranuclear zinc clusters: Selective absorption of CO2 and luminescent response to lanthanide (III) ions
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A new anionic metal-organic framework, {[H3O]2[Zn4(μ4-O)(NSBPDC)4]·16(H2O)]}n (1), was synthesized under solvothermal conditions using a predesigned multifunctional dicarboxylic
- Cheng, Ai-Ling,Zhang, Juan,Ren, Ling-Ling,Gao, En-Qing
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- Synthesis of Tetracyclic 2,3-Dihydro-1,3-diazepines from a Dinitrodibenzothiophene Derivative
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Triply fused 1,3-diazepine derivatives have been obtained by acidic reduction of rotationally locked and sterically hindered nitro groups in the presence of an aldehyde or ketone. The nitro groups are sited on adjacent rings of a dicyanodibenzothiophene-5,5-dioxide, which also displays fully reversible two-electron-accepting behavior. The synthesis, crystallographically determined molecular structures, and aspects of the electronic properties of these new molecules are presented.
- Montanaro, Stephanie,Wright, Iain A.,Batsanov, Andrei S.,Bryce, Martin R.
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- A functional anionic metal–organic framework for selective adsorption and separation of organic dyes
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A 3D porous anionic MOF, {[(CH3)2NH2][Zn6(μ3-OH)(μ4-O)(NSBPDC)5(H2O)2]·DMF·12H2O}n (Zn-1) (H2NSBPDC = 6-nitro-2,2′-sulfone-4,4′-dicarboxylic acid), has been synthesized and characterized. Zn-1 exhibits a rare 5-connected ‘sqp’ net and contains large 3D intersecting channels modified with functional groups. Notably, Zn-1 can adsorb cationic dyes selectively and effectively, even for large molecules including Rhodamine B and Crystal Violet. The influences of the constant time and initial concentration of MB on the adsorption capacity of Zn-1 have been studied in detail. Furthermore, the kinetic research indicates that the adsorption of MB matches well with the pseudo second-order model. In addition, the material of Zn-1 is reusable, and the adsorbed dye (MB) can be released in saturated DMF/ethanol solution of LiNO3.
- Cui, Ying-Ying,Zhang, Juan,Ren, Ling-Ling,Cheng, Ai-Ling,Gao, En-Qing
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- Unprecedented sulfone-functionalized metal-organic frameworks and gas-sorption properties
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A study was conducted to demonstrate significant sulfone-functionalized metal-organic frameworks (MOF) and gas sorption properties. The ligand (1,1'-biphenyl)-4,4'-dicarboxylic acid was functionalized with -SO3H groups and used as a linker to construct coordination polymers and conduct the investigations. The sulfone (-SO2) derivative of (1,1'-biphenyl)-4, 4'-dicarboxylic acid was isolated to conduct the investigations. The investigations revealed two novel three dimensional (3D) non-isoreticular porous MOFs with specific structures. The MOFs were isolated from controlled solvothermal reactions between (1,1'-biphenyl)-4,4'-dicarboxylic acid and Zn(NO3)2·6H2O. The unique structures of the MOFs were demonstrated as UoC-1 and UoC-2 that included the formation of novel inorganic secondary building units (SBUs) with significant double organic bridging connectivity in all directions.
- Neofotistou, Eleftheria,Malliakas, Christos D.,Trikalitis, Pantelis N.
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- Synthesis and properties of 4,4'-bis[5-alkyl(aryl)benzoxazol-2-yl]-2- hydroxy(alkoxy)biphenyls
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Synthesis of 2-hydroxy(methoxy)-4,4'-biphenyldicarboxylic acids was developed. Based on their reactions with o-aminophenols we prepared for the first time 4,4'-bis[5-alkyl(aryl)benzoxazol-2-yl]-2-hydroxy-(alkoxy)biphenyls, which might be of interest as lu
- Ol'khovik,Matveenko,Kalechits,Pap,Zenyuk
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- Enhanced gas sorption and breathing properties of the new sulfone functionalized COMOC-2 metal organic framework
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A new sulfone functionalized vanadium metal-organic framework (MOF), denoted as SO2-COMOC-2, has been synthesized solvothermally. Its structural and gas sorption properties towards CO2 and CH4 have been evaluated and compared to those of the pristine COMOC-2 material. The SO2-COMOC-2 shows a remarkable increase in CO2 capacity at ambient pressure (2.13 mmol g-1 at 273 K vs. 1.23 mmol g-1 for the pristine COMOC-2). Additionally, the high pressure CO2 sorption isotherm shows a distinctive two-step sorption behavior with a final capacity of 12.45 mmol g-1 for SO2-COMOC-2 at 303 K, while for CH4 a typical Type I isotherm was obtained with a capacity of 4.13 mmol g-1. In situ synchrotron X-ray powder diffraction measurements have been carried out to characterize the structural flexibility of the materials, showing both the presence of large pore and narrow pore form. Furthermore, synchrotron XANES and a variety of spectroscopic techniques have been utilized to verify the presence of hydroxyl groups and the existence of the mixed vanadium oxidation states in the titled MOF structure.
- Wang, Guangbo,Leus, Karen,Couck, Sarah,Tack, Pieter,Depauw, Hannes,Liu, Ying-Ya,Vincze, Laszlo,Denayer, Joeri F. M.,Van Der Voort, Pascal
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supporting information
p. 9485 - 9491
(2016/07/06)
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