نتایج جستجو برای: keggin type structure
تعداد نتایج: 2715186 فیلتر نتایج به سال:
The involvement of water in the selective oxidation MAL to MAA over a pure Keggin-type H3PMoO12O40 catalyst was investigated using an in situ DRIFTS reactor coupled with mass spectrometer for first time elucidate reaction pathway associated water.
Omeprazole, (6-methoxy-2-((4-methoxy-3,5-dimethylpyridin-2-yl)methylsulfinyl)-1H-benzimidazole is a well-established prescribed drug, exhibits proton pump inhibitor activity. In this work, a novel, facile, economical and selective oxidation approach using H3PW12O40 as Keggin type heteropolyacids along with H2O2 in the ...
Reactive oxygen species (ROS) can be used as an effective method to treat tumors. Artificial oxidase has received increasing attention a catalyst for ROS generation in fields ranging from bioinorganic chemistry pharmaceutical chemistry. In this study, artificial based on binuclear zinc complex and Keggin-type silicotungstate [Zn2(4,4?-bpy)(Phen)2][SiW12O40] (ZSW) (4,4?-bpy = 4,4?-bipyridine; Ph...
H [PV Mo O ] catalyzed oxidation of thiols to related disulfides under microwave irradiation(MW). 5 2 10 40 Hydrogen Peroxide as an oxidizing reagent under mild conditions carried out this reaction. This system provides an efficient convenient and practical method for the syntheses of symmetrical disulfides. In this work, the comparisons among the Keggin and Dawson type polyoxometalates are add...
H5PV2Mo10O40 polyoxometallate Keggin clusters supported on ZrO2, TiO2, SiO2, and Al2O3 are effective catalysts for CH3OH oxidation reactions to form HCHO, methyl formate (MF), and dimethoxymethane (DMM). Rates and selectivities and the structure of supported clusters depend on the surface properties of the oxide supports. Raman spectroscopy showed that Keggin structures remained essentially int...
The design and assembly of metal-organic complexes (MOCs) have attracted considerable attention, because of their diverse topologies and potential applications in areas such as catalysis and materials science [1 – 6]. Polyoxometalates (POMs), as a unique class of inorganic metal oxide clusters, have been regarded as excellent candidates to obtain MOCs due to their controllable shapes and sizes,...
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