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.
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TL;DR: A simple, safe, and inexpensive amide bond formation from nonactivated carboxylic acids and free amines is presented in this article, using Zr(IV) and Hf(IV)-substituted polyoxom...
Abstract: A simple, safe, and inexpensive amide bond formation directly from nonactivated carboxylic acids and free amines is presented in this work. Readily available Zr(IV)- and Hf(IV)-substituted polyoxom...
43 citations
TL;DR: In this paper, a novel polyoxometalate (POM) Na2(H2en)2{(VO)10[B14O30(OH)2]2],Mn4(C2O4] [B2O 4(OH]2] 2]
43 citations
TL;DR: The redox-controlled morphology change is modulated by variation of the electrostatic interactions between the inorganic polyanion and the organic cation DODA through controlling the redox properties of the POM component, as shown by the XRD, X-ray photoelectron spectroscopic, and ¹H NMR measurements.
Abstract: Polyoxometalate (POM) complex (DODA)₂[Mo₆O₁₉] with a symmetrical linear structure was prepared conveniently by replacing the tetrabutylammonium (TBA) counterions of Lindquist-type cluster (TBA)2 [Mo₆O₁₉] with cationic surfactant dioctadecyldimethylammonium (DODA). A helical self-assembled structure of the complex was formed in dichloromethane/propanol. The dynamically reversible transformation between helical and spherical assemblies on alternate UV irradiation and H₂O₂ oxidation was characterized by SEM, TEM, and UV/Vis studies. The redox-controlled morphology change is modulated by variation of the electrostatic interactions between the inorganic polyanion and the organic cation DODA through controlling the redox properties of the POM component, as shown by the XRD, X-ray photoelectron spectroscopic, and ¹H NMR measurements. The strategy applied herein is a unique example of targeted smart and helical assembly of POM complexes.
43 citations
TL;DR: A novel amino acid salt of 18-Molybdodiphosphate formulated (Lys)2H6[P2Mo18O62]·16H2O was synthesized and its structure characterized.
43 citations
TL;DR: A series of polyoxometalate (POM)-based amphiphilic catalysts were prepared via functionalization of the V-containing Keggin POM H4PMo11VO40 by cationic surfactants with different carbon-chain lengths as discussed by the authors.
Abstract: A series of polyoxometalate (POM)-based amphiphilic catalysts were prepared via functionalization of the V-containing Keggin POM H4PMo11VO40 by cationic surfactants with different carbon-chain lengths. These prepared catalysts were systematically characterized by Fourier transform infrared (FT-IR), 1H nuclear magnetic resonance (NMR), thermogravimetric (TG), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 adsorption, and X-ray diffraction (XRD) techniques as well as by the elemental analysis. Their catalytic activities were evaluated in the selective oxidation of benzyl alcohol to benzaldehyde by H2O2 under organic solvent-free conditions. Among the catalysts investigated, the amphiphilic (ODA)4PMo11VO40 (ODA: octadecylmethylammonium) shows the highest catalytic efficiency for the selective oxidation. The high activity and selectivity of the prepared (ODA)4PMo11VO40 are probably related to its amphiphilic property. A maximum conversion of benzyl alcohol is 60.6% with a selec...
43 citations