Nanocomposites Containing Keggin Anions Anchored on Pyrazine-Based Frameworks for Use as Supercapacitors and Photocatalysts

2019 ◽  
Vol 2 (5) ◽  
pp. 3039-3049 ◽  
Author(s):  
Nana Du ◽  
Lige Gong ◽  
Lingyu Fan ◽  
Kai Yu ◽  
Huan Luo ◽  
...  
Keyword(s):  
Keggin Anions

ChemInform Abstract: MODELS FOR HETEROPOLY BLUES. DEGREES OF VALENCE TRAPPING IN VANADIUM(IV)- AND MOLYBDENUM(V)-SUBSTITUTED KEGGIN ANIONS

1975 ◽  
Vol 6 (16) ◽  
pp. no-no
Author(s):  
JULIANNE J. ALTENAU ◽  
MICHAEL T. POPE ◽  
RONALD A. PRADOS ◽  
HYUNSOO SO
Keyword(s):  
Keggin Anions ◽  
Heteropoly Blues

scholarly journals A spectroscopic investigation of 12-tungstophosphoric acid alkali salts

2000 ◽  
Vol 65 (5-6) ◽  
pp. 399-406 ◽  
Author(s):  
Ubavka Mioc ◽  
Marija Todorovic ◽  
Snezana Uskokovic-Markovic ◽  
Zoran Nedic ◽  
Nada Bosnjakovic
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Investigation ◽  
Dynamic Equilibrium ◽  
Host Lattice ◽  
Tungstophosphoric Acid ◽  
Heteropoly Acids ◽  
Ir And Raman Spectroscopy ◽  
Keggin Anions ◽  
Ir And Raman ◽  
Alkali Salts

In this paper the latest results of our continuing investigation of heteropoly acids and their salts are reported. Specially attention was paid to the influence of cations on the dynamic equilibrium of protonic species, as well as on the structure of the host lattice itself, i.e., the Keggin anions. The investigations were done by IR and Raman spectroscopy within the range of 1200.40 cm-1.

scholarly journals Synthesis and Characterization of Cu(II) Substituted Hexa Tungstate and Molybdate of the Anderson Type Anion [Xn+M6O24]-(12-n)

2008 ◽  
Vol 5 (s1) ◽  
pp. 1021-1024 ◽  
Author(s):  
K. C. Dey ◽  
V. Sharma
Keyword(s):  
Ir Spectra ◽  
Copper Chloride ◽  
Small Deviation ◽  
Thermal Analyses ◽  
Sodium Molybdate ◽  
Atomic Ratio ◽  
Molecular Formula ◽  
Elemental Analyses ◽  
Keggin Anions

Sodium salts of copper substituted heteropoly compounds having molecular formula Na10[CuIIWVI6O24].22H2O(1) and Na10[CuIIMoVI6O24]. 19H2O(2) analogous to the Anderson type anion [Xn+M6O24]─(12-n)were synthesized according to the literature method. Compound(1) was synthesized from aqueous acidic solution containing sodium tungstate and copper chloride and compound(2) from sodium molybdate and copper chloride solution. The elemental analyses show 1:6 atomic ratio of the heteroatom to the addenda in both the compounds. The IR spectra for both the compounds are in good agreement with the reported formulae. A small deviation in IR spectra are observed than that established for Keggin anions. CuO6acts as hetero group which replaces MO6(M=W or Mo) from the Anderson structure. The thermal analyses of the compounds show the loss of the peripheral water molecules. The molecular weight of the compound (1) and (2) have been found as 2212.5 and 1600.5 respectively.

Four Keggin-based compounds constructed by a series of pyridine derivatives: synthesis, and electrochemical, photocatalytic and fluorescence sensing properties

2020 ◽  
Vol 44 (35) ◽  
pp. 15122-15130 ◽  
Author(s):  
Hai-chen Mou ◽  
Jun Ying ◽  
Ai-xiang Tian ◽  
Hong-tao Cui ◽  
Xiu-li Wang
Keyword(s):  
Electrochemical Properties ◽  
Fluorescence Sensor ◽  
Pyridine Derivatives ◽  
Fluorescence Sensing ◽  
Sensing Properties ◽  
Keggin Anions

Four compounds based on Keggin anions and AgI ions were obtained, the photocatalytic and electrochemical properties were studied. Compound 4 can act as a Hg2+ fluorescence sensor.

Double-Keggin-type Anion-templated Synthesis of a 3D Porous Coordination Polymer of Eu(III) Ions and dpdo Ligands

2008 ◽  
Vol 63 (3) ◽  
pp. 255-260 ◽  
Author(s):  
Mei Lin Wei ◽  
Rui Ping Sun ◽  
Kai Jiang
Keyword(s):  
Coordination Polymer ◽  
Self Assembly ◽  
Water Solution ◽  
Metal Organic Framework ◽  
X Ray Diffraction ◽  
X Ray ◽  
Keggin Type ◽  
Keggin Anions ◽  
Metal Organic ◽  
Porous Coordination Polymer

A porous coordination polymer, {[Eu(dpdo)4(H2O)3]H(SiMo12O40)(dpdo)0.5(CH3CN)0.5(H2O)4}n (1), (where dpdo is 4,4′-bipyridine-N,N′-dioxide) templated by double-Keggin-type polyanions has been synthesized through the self-assembly of Eu(III) ions and dpdo in acetonitrile/water solution and structurally characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. The X-ray structure analysis reveals that compound 1 exhibits a 3D non-interwoven framework with large cavities housing centro-symmetrically related shoulder-by-shoulder double-Keggin anions as guests. The result of a thermogravimetric analysis suggests that the metal-organic framework has high thermal stability.

Insertion of electrochemically reduced Keggin anions into layered double hydroxides

1997 ◽  
Vol 7 (9) ◽  
pp. 1937-1939 ◽  
Author(s):  
Ewa M. Serwicka ◽  
Paweł Nowak ◽  
Krzysztof Bahranowski ◽  
William Jones ◽  
Fathi Kooli
Keyword(s):  
Layered Double Hydroxides ◽  
Keggin Anions ◽  
Double Hydroxides

Synthesis, characterization and in vitro antitumor activity of diorganometallo complexes γ-Keggin anions

2001 ◽  
Vol 4 (7) ◽  
pp. 372-374 ◽  
Author(s):  
Xiaohong Wang ◽  
Jutao Liu ◽  
Jianxin Li ◽  
Jingfu Liu
Keyword(s):  
Antitumor Activity ◽  
Keggin Anions

A novel large heteropolytungstate constructed from two types of lacunary Keggin anions: K7Na13[(PW11O39)2(PW9O34)2(W2O3)2]·25H2O

2007 ◽  
Vol 360 (10) ◽  
pp. 3376-3379 ◽  
Author(s):  
Jiye Zhang ◽  
Chao Qin ◽  
Enbo Wang ◽  
Zhongmin Su ◽  
Lin Xu
Keyword(s):  
Keggin Anions
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