نتایج جستجو برای: polyoxometalates poms
تعداد نتایج: 1237 فیلتر نتایج به سال:
While the d(0) transition-metal POMs of Group V (V(5+), Nb(5+), Ta(5+)) and Group VI (Mo(6+), W(6+)) have been known for more than a century, the actinyl peroxide POMs, specifically those built of uranyl triperoxide or uranyl dihydroxidediperoxide polyhedra, were only realized within the last decade. While virtually every metal on the Periodic Table can form discrete clusters of some type, the ...
Aggregation of polyoxometalates (POM) is largely responsible for the reduced performance POM-based energy-storage systems. To address this challenge, here, precise confinement single Keggin-type POM molecule in a porous carbon (PC) unimodal super-micropore (micro-PC) realized. Such single-molecule enables sufficient activity center exposure and maximum electron-transfer from micro-PC to POM, wh...
In the last decade organic-inorganic hybrid materials have become essential in materials science as they combine properties of both building blocks. Nowadays the main routes for their synthesis involve electrostatic coupling, covalent grafting, and/or solvent effects. In this field, polyoxometalates (POMs) have emerged as interesting inorganic functional building blocks due to their outstanding...
Self-assembly has a unique presence when it comes to creating complicated, ordered supramolecular architectures from simple components under mild conditions. Here, we describe a self-assembly strategy for the generation of the first homogeneous supramolecular metal-organic framework (SMOF-1) in water at room temperature from a hexaarmed [Ru(bpy)3](2+)-based precursor and cucurbit[8]uril (CB[8])...
Polyoxometalates (POMs) show promising biological activities, but the mechanism of these potential therapeutic effects remains to be elucidated at a molecular level. As a step in this direction, the interaction between the Eu-containing decatungstate [EuW(10)O(36)](9-) and human serum albumin (HSA) has been studied by several techniques. Fluorescence/luminescence analysis showed the existence o...
Polyoxometalates (POMs) are discrete anionic metal-oxide nanoclusters which exhibit unrivalled structural diversity, exceptional physical properties, and have many potential applications. Nonetheless, possessing high crystalline energy and hydrophilic nature, the assembly of POM clusters into rationally design architectures has been a long-standing bottleneck for their ultimate use in advanced ...
In this paper we study the electronic structure of Lindqvist, Keggin, Dawson and Preyssler polyoxometalates (POMs) at the DFT level, particularly their LUMOs and reduction energies. Our aim was to revisit the previously reported evidence that a linear relationship exists between reduction potentials and molecular charges in Keggin anions. In this line of thought, we calculated one simple struct...
The quest for new catalytic and highly enantioselective processes is currently one of the most intensively studied areas in chemical synthesis. In this context, chiral polyoxometalates (POMs) have become a topic of recent interest owing to their potential application in medicine and asymmetric catalysis. Among numerous applications of POMs, catalysis is by far the most studied, owing to the eno...
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,...
Abstract Sunlight and water are among the most plentiful sustainable resources of energy. Natural photosystem II in plants uses these ecofriendly manner for production atmospheric oxygen Inspired by this natural process, development artificial catalytic system to facilitate solar-induced splitting continuous hydrogen is holy grail chemist energy experts meet future demand at minimal environment...
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