scispace - formally typeset
Search or ask a question
Topic

Polyoxometalate

About: Polyoxometalate is a research topic. Over the lifetime, 3493 publications have been published within this topic receiving 94123 citations. The topic is also known as: POM.


Papers
More filters
Journal ArticleDOI
TL;DR: The cyclic voltammograms measurement, the rGO/PTA composite film displays good electrocatalytic activity for the oxidation of dopamine (DA), and the oxidation peak current (I(pa)) increases gradually with increasing the dopamine concentration, which may be used in electrochemical biosensors.
Abstract: Graphene oxide (GO) nanosheets and polyoxometalate such as H3PW12O40 (PTA) are prepared into a multilayer film via a layer-by-layer inkjet printing method. The GO/PTA composite thin film shows linear, uniform and regular layer-by-layer growth. Under UV-irradiation, a photoreduction reaction takes place in the film which converts GO to reduced GO (rGO) due to the photoreduction activity of polyoxometalate clusters. According to the cyclic voltammograms measurement, the rGO/PTA composite film displays good electrocatalytic activity for the oxidation of dopamine (DA). The oxidation peak current (Ipa) increases gradually with increasing the dopamine concentration, which may be used in electrochemical biosensors.

64 citations

Journal ArticleDOI
TL;DR: In this paper, a series of [Mg2+(1-x)M3+x(OH)2][TA2-(x/2)]·zH2O (M3+= Ga3+ or Al3+ and TA = C6H4(COO-)2) from mixed-metal chloride solutions with initial M3+ mole fractions of 0.20, 0.25, and 0.33, at constant pH values of 6.8, 7.7, 8.6, and 10.0.
Abstract: We have synthesized a series of [Mg2+(1-x)M3+x(OH)2][TA2-(x/2)]·zH2O (M3+= Ga3+ or Al3+ and TA = C6H4(COO-)2) from mixed-metal chloride solutions with initial M3+ mole fractions of 0.20, 0.25, and 0.33, at constant pH values of 6.8, 7.7, 8.6, and 10.0. Terephthalate-containing products were obtained only under conditions that resulted in a Mg:M3+ ratio of 2:1 in the mixed metal hydroxide layers, indicating that a high layer charge density is necessary to incorporate terephthalate anions between the inorganic layers. Anion-exchange reactions were subsequently performed to produce LDHs intercalated with PW11O397- and H2W12O406- anions, yielding products that displayed sharp powder diffraction patterns. In each case, the surface area of the POM-intercalated product was found to be approximately 40−45 m2/g, indicating that the micropore system is totally blocked and that the materials are virtually nonporous; this may result from the high layer charge density of the LDH−terephthalate precursors.

64 citations

Journal ArticleDOI
Zhong Li1, Li-Dan Lin1, Hao Yu1, Xin-Xiong Li1, Shou-Tian Zheng1 
TL;DR: This work demonstrates that the use of high-negative and high-symmetry lacunary polyoxometalates (POMs) for the clustering of alkali metal ions is a feasible strategy not only for the formation of rare high-nuclearity alkali-metal clusters but also for the construction of new-type all-inorganic ionic porous materials.
Abstract: This work demonstrates that the use of high-negative and high-symmetry lacunary polyoxometalates (POMs) for the clustering of alkali metal ions is a feasible strategy not only for the formation of rare high-nuclearity alkali-metal clusters but also for the construction of new-type all-inorganic ionic porous materials. By the strategy, an unprecedented high-nuclearity K-H2 O cluster {K42 (H2 O)60 } with core-shell K6 @K36 configuration is stabilized by 8 C3v -symmetry trivacant POMs [GeW9 O34 ]10- , forming a novel giant ionic alkali-metal-POM composite cluster {K42 Ge8 W72 O272 (H2 O)60 } with more than 100 metal centers. The incorporated 42-nuclearity K-H2 O cluster {K42 (H2 O)60 } exhibits the highest-nuclearity alkali-metal-water cluster known to date in POM chemistry. Further, the giant {K42 Ge8 W72 O272 (H2 O)60 } clusters can be linked by another kind of alkali metal ions Na+ to generate a fascinating three-dimensional all-inorganic ionic porous framework with high chemical stability, proton conductivity, and water vapor adsorption.

64 citations

Journal ArticleDOI
Yizhan Wang1, Haolong Li1, Che Wu1, Yang Yang1, Lei Shi1, Lixin Wu1 
TL;DR: Managing the blues: Chiral heteropoly blues of achiral polyoxometalate clusters were created through an intermolecular interaction with a chiral organic compound.
Abstract: Managing the blues: Chiral heteropoly blues of achiral polyoxometalate clusters were created through an intermolecular interaction with a chiral organic compound Controllable chiroptical switching of the cluster complexes was possible through reversible photochromism of the polyoxometalates (see picture)

64 citations

Journal ArticleDOI
TL;DR: In this article, the vanadium precursors of vanadium-substituted Keggin-type phosphomolybdates such as H4PVMo11O40, H5PV2Mo10O40 and H6PV3Mo9O40 in butyronitrile were used to oxidize adamantane with molecular oxygen as a sole oxidant.

64 citations


Network Information
Related Topics (5)
Catalysis
400.9K papers, 8.7M citations
91% related
Alkyl
223.5K papers, 2M citations
87% related
Photocatalysis
67K papers, 2.1M citations
87% related
Crystal structure
100.9K papers, 1.5M citations
87% related
Cyclic voltammetry
55.9K papers, 1.4M citations
87% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023246
2022566
2021213
2020218
2019187
2018216