نتایج جستجو برای: polyoxometalates poms

تعداد نتایج: 1237  

Journal: :Nature Chemistry 2008

2017
Hongqian Cao Chunyan Li Wen Qi Xiangjun Meng Rui Tian Yanfei Qi Wei Yang Juan Li

Polyoxometalates (POMs) have shown the potential anti-bacterial, anti-viral and anti-tumor activities. In order to improve their physiological stability and antitumour activity for medical application, K2Na[AsIIIMo6O21(O2CCH2NH3)3]·6H2O doped silica nanospheres (POM@SiO2) with diameters of ~40 nm have been synthesized by the water-in-oil microemulsion method in this study. The obtained spheres ...

2015
Dana J. Levine Jan Stöhr Lillian E. Falese Julian Ollesch Holger Wille Stanley B. Prusiner Jeffrey R. Long

The phosphotungstate anion (PTA) is widely used to facilitate the precipitation of disease-causing prion protein (PrP(Sc)) from infected tissue for applications in structural studies and diagnostic approaches. However, the mechanism of this precipitation is not understood. In order to elucidate the nature of the PTA interaction with PrP(Sc) under physiological conditions, solutions of PTA were ...

2011
Julie E. Molinari Lingaiah Nakka Taejin Kim Israel E. Wachs

Molybdenum-based Keggin polyoxometalates (POMs) containing vanadium, with the formula H3+xPMo12 xVxO40 (MPAV) and x varying from0 to 3, exhibit unique catalytic properties because of their bifunctional nature and have been investigated as catalysts both for acidic and for oxidative reactions. 3 The addition of vanadium centers are beneficial for redox catalysis, shifting the molybdophosphoric a...

Journal: :Dalton transactions 2011
Chun-Guang Liu Wei Guan Li-Kai Yan Zhong-Min Su

High-valent transition-metal-substituted Keggin-type polyoxometalates (POMs) are active and robust oxidation catalyst. The important oxidized intermediates of these POM complexes are very difficult to be characterized by using the experimental method, and thus no detail information is available on such species. In the present paper, density functional theory (DFT) calculations have been carried...

2014
Gijo Raj Colas Swalus Eglantine Arendt Pierre Eloy Michel Devillers Eric M Gaigneaux

The hybridization of polyoxometalates (POMs) through an organic-inorganic association offers several processing advantages in the design of heterogeneous catalysts. A clear understanding of the organization of these hybrid materials on solid surfaces is necessary to optimise their properties. Herein, we report for the first time the organization of Keggin phosphotungstic [PW12O40](3-) and Wells...

Journal: :Nanoscale 2018
Feiyang Yu Ya Gao Zhongling Lang Yuanyuan Ma Liying Yin Jing Du Huaqiao Tan Yonghui Wang Yangguang Li

Molybdenum carbides are considered as one type of privileged noble-metal-free electrocatalysts for hydrogen evolution reactions (HER) due to their d-band electron structure, which is similar to Pt. Especially, the electronic structure of such materials can be further adjusted by elemental doping to improve their electrocatalytic activity. Herein, we selected the Anderson-type polyoxometalates (...

Journal: :Journal of Coordination Chemistry 2022

Despite the proliferation of tungstate and molybdate polyoxometalates (POMs) inclusion sulfides into these structures proved to be challenging. The use appropriate preformed thiomolybdate building blocks has over recent years developed an extensive field with a wide range diverse structural features sizes. Initial explorations focused largely either on combinatorial approach POM dimeric units o...

Journal: :Journal of Physical Chemistry C 2021

Polyoxometalates (POMs) are promising candidates for molecular electronic applications because (1) they inorganic molecules, which have better CMOS compatibility compared to organic molecules; (2) easily synthesized in a one-pot reaction from metal oxides (MOx) (where the M can be, e.g., W, V, or Mo, and x is an integer between 4 7); (3) POMs self-assemble form various shapes configurations, th...

Journal: :Catalysts 2022

Polyoxometalates (POMs), as carbon-free metal-oxo-clusters with unique structural properties, are emerging water-splitting electrocatalysts. Herein, we explore the development of cobalt-containing polyoxometalate immobilized over carbon nanotube fiber (CNTF) (Co4POM@CNTF) towards efficient electrochemical oxygen evolution reaction (OER). CNTF serves an excellent electron mediator and highly con...

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