نتایج جستجو برای: polyoxometalates poms
تعداد نتایج: 1237 فیلتر نتایج به سال:
The miniaturization, high performance, energy efficiency, and new added functionalities are the essential drivers of modern information data storage processing technologies. Polyoxometalates (POMs) characterized by atomically well-defined structures with discrete levels ability to undergo redox transformations viewed as promising active components for integration into next-generation (beyond-CM...
Splitting of water to produce hydrogen and oxygen is a green effective method clean energy. Finding an efficient decomposition catalyst the key step realize decomposition. In this work, by choosing from literature, six polynuclear manganese (Mn) containing polyoxometalates (Mn-POMs) with different Mn-O clusters oxidation states Mn, [MnIIMnIIISiW10O37(OH)(H2O)]6? (Mn2-POM), [MnII3MnIII(H2O)2(PW9...
The aerobic oxidation of alcohols was efficiently completed in high conversion and selectivity using Cu3/2[PMo12O40]/SiO2 as catalyst under mild reaction condition. This reaction provides a new environmentally friendly rout to the conversion of alcoholic function to carbonyl groups.
We have demonstrated that a pentaerythritol-derivatized hexavanadate can be easily esterified with acid anhydrides using 4-(N,N-dimethylamino)pyridine (DMAP) as a catalyst, which provides a convenient method for the functionalization of polyoxometalates.
Nanometric ions, such as polyoxometalates (POMs) or ionic boron clusters, with low charge density have previously shown a strong propensity to bind macrocycles and adsorb neutral surfaces: micellar, surfactant covered water–air polymer surfaces. These association phenomena were arise from solvent-mediated effect called the (super-)chaotropic effect. We show here by combining cloud point (CP) me...
The assembly of nanoscale polyoxometalate (POM) clusters has been dominated by the highly reduced icosahedral {Mo132} “browns” and toroidal {Mo154} “blues” which are 45 % 18 reduced, respectively. We hypothesised that there is space for a greater diversity structures in this immediate reduction zone. Here we show it possible to make mix-valence POMs presenting new classes polyoxomolybdates: [Mo...
Polyoxometalates (POMs) have shown great potential for applications in photocatalysis due to their unique structural features, tunable band gap, and environmental benignity. Herein, a Fe ion-incorporated Co4W6O21(OH)2·4H2O sphere network POM was successfully synthesized via simple hydrothermal process. A DFT calculation proved that the ion partially replaced cobalt atoms, forming FexCo4−xWOH, w...
The aerobic oxidation of alcohols was efficiently completed in high conversion and selectivity using Cu3/2[PMo12O40]/SiO2 as catalyst under mild reaction condition. This reaction provides a new environmentally friendly rout to the conversion of alcoholic function to carbonyl groups.
Single atom catalysts—SACs—have received intense interest in sustainable energy research due to their enormous application potential and broad catalytic scope. In particular, SACs anchored on molecular metal oxides—polyoxometalates (POMs)—offer unrivalled possibilities as models understand the function of these complex systems atomic level. Research questions which are difficult address for cla...
The hybrid hydrogel materials meet important social challenges, including the photocatalytic purification of water and bio-medical applications. Here, we demonstrate two scenarios polyacrylamide-TiO2 (PAAm@TiO2) composite design using calcium alginate (Alg-Ca) or Keplerate-type polyoxometalates (POMs) {Mo132} tuning polymer network structure. Calcium molding allowed us to produce polyacrylamide...
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