Synthesis, characteristics conductivity of heteropoly compound Na6[MnMn(OH2)W11O39] · 16H2O

A new B-Anderson-type heteropoly compound containing binuclear copper(II) coordination ions: synthesis, molecular structure and properties of [Cu2(phen)2(CH3COO)2(H2O)2] [HAl(OH)6(Mo6O18)]·2.5H2O (phen = 1,10-phenanthroline)

Journal of Coordination Chemistry ◽

10.1080/00958970500361189 ◽

2006 ◽

Vol 59 (6) ◽

pp. 597-605 ◽

Cited By ~ 5

Author(s):

Jing-Ping Wang ◽

Jun-Wei Zhao ◽

Su-Zhi Li ◽

Jing-Yang Niu

Keyword(s):

Molecular Structure ◽

Heteropoly Compound ◽

Structure And Properties ◽

Binuclear Copper

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Efficiency of using heteropoly compounds of the type (NH4)2[Co(H2O)4]2[Mo8O27]∙6H2O as catalysts for the production of ethylene

Butlerov Communications ◽

10.37952/roi-jbc-01/19-60-11-85 ◽

2019 ◽

Vol 60 (11) ◽

pp. 85-92

Author(s):

Nikita A. Panurin ◽

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Natalya Yu. Isaeva ◽

Ekaterina B. Markova ◽

Tatiana F. Sheshko ◽

...

Keyword(s):

Thermal Stability ◽

Catalyst Deactivation ◽

Coke Formation ◽

Fluorescence Analysis ◽

Heteropoly Compound ◽

Cascade Reactions ◽

Environmental Benefits ◽

Heteropoly Compounds ◽

X Ray ◽

Cell Parameters

Carrying out heterogeneous acid catalysis with the use of heteropoly compounds has received considerable attention due to the great economic and environmental benefits. In spite of this, its industrial application is limited as there are difficulties in catalyst regeneration (settling) caused by its relatively low thermal stability. The aim of present work was to search and select catalysts related to the class of heteropoly compounds for propane cracking, to test the selectivity of the prosses as well as to discuss possible approaches for solving the problem of catalyst deactivation, that can contribute to achieve stable characteristics of solid heteropoly catalysts. Among these approaches are: the development of new catalysts with high thermal stability, the modification of catalysts to promote coke combustion, the inhibition of coke formation on heteropoly compound catalysts during the process, carrying out the reactions in supercritical media and also the cascade reactions using a multifunctional heteropoly catalyst. The obtained catalyst was also studied by physicochemical methods to get deep knowledge about which features of these compounds influence on the catalytic activity. A highly active and selective catalyst for ammonium octomolybdenocobaltate(II) ammonium (NH4)2[Co(H2O)4]2[Mo8O27]∙6H2O was synthesized for cracking associated petroleum gases. The qualitative, quantitative, and structural composition as well as the specific surface area of the obtained catalyst was established by the methods of X-ray diffraction, X-ray phase and fluorescence analysis. It was revealed that ammonium octomolybdenocobaltate(II) crystallizes in a triclinic syngony with cell parameters: а = 8.6292(9) Å b = 9.4795(10) Å c = 12.2071(13) Å α = 104.326(2)° β = 109.910(2)° γ = 100.820(2)°.

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Na6[TeMo6O24]·22 H2O – A Layered Heteropoly Compound with the Chain-Like Polycation {Na3(Η2O)1111}n3n+

Zeitschrift für Naturforschung B ◽

10.1515/znb-1993-0402 ◽

1993 ◽

Vol 48 (4) ◽

pp. 404-408 ◽

Cited By ~ 10

Author(s):

Christian Robl ◽

Mona Frost

Keyword(s):

Aqueous Solution ◽

Hydrogen Bonds ◽

Oxygen Atom ◽

Single Crystals ◽

Solution Space ◽

Heteropoly Compound ◽

Water Molecules ◽

Space Group ◽

The Third ◽

Bonding Mode

Colourless triclinic single crystals of Na6[TeMo6O24] · 22 H2O were grown from aqueous solution (space group P 1, a = 1030.89(9), b = 1056.7(1), c = 1106.32(9) pm, α = 90.120(7), β = 115.220(6), γ = 105.195(7), Ζ = 1, 295 Κ, 336 parameters, 3181 reflections, Rg = 0.0186). There are three crystallographically independent Na+ cations. Two of them are coordinated octahedrally by water molecules only. The third Na+ cation is bound to five H2O and one oxygen atom (O(4)) belonging to the Anderson-Evans type anion [TeMo6O24]6-. The sodium-centered coordination octahedra are linked by common edges exclusively formed by water molecules to yield chain-like polycations {Na3(H2O)11}n,3n+ which are bound by the Na(1)-O(4) contact to the anions situated on crystallographic centers of inversion forming a layer-like arrangement. Further connections between the polycations and the [TeMo6O24]6- anions are established by hydrogen bonds involving all the oxygen atoms of the anion except O(4) as almost equivalent proton acceptors regardless of their bonding mode to Te or Mo.

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Study on the Synthesize, Characterization, and Conductive Performance of Nickelzircomolybdnum Heteropoly Acid Salt with Keggin Structure

Advances in Polymer Technology ◽

10.1155/2019/9501593 ◽

2019 ◽

Vol 2019 ◽

pp. 1-4

Author(s):

Zhihong Zhang ◽

Baoying Wang ◽

Yijing Zhang ◽

Gehong Zhang ◽

Yujing Wang

Keyword(s):

Conduction Mechanism ◽

Heteropoly Acid ◽

Electrochemical Impedance ◽

Impedance Spectrum ◽

Heteropoly Compound ◽

Electrochemical Impedance Spectrum ◽

Acid Salt ◽

X Ray Diffraction ◽

Protonic Conduction ◽

X Ray

A novel heteropoly acid salt, Na6[Ni(Mo11ZrO39)]·20H2O, has been synthesized by the means of acidification and adding the reactants into the solution step by step. The heteropoly compound was characterized by elemental analysis, TGA/DSC, infrared spectrum, ultraviolet spectrum, X-ray diffraction, and SEM. Its protonic conduction was measured by the means of the electrochemical impedance spectrum. The results showed that it belongs to the Keggin type, and its conductivity value was 1.23 × 10–2 S/cm at 23°C when the relative humidity was 60%, and the conductivity enhanced with the elevated temperature. Its proton conduction mechanism was in accordance with vehicle mechanism, and the activation energy was 27.82 kJ/mol.

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