نتایج جستجو برای: polyoxometalates (poms)

تعداد نتایج: 1237  

Journal: :Chemical communications 2011
Xiaoxi Zheng Long Zhang Jiuyuan Li Sanzhong Luo Jin-Pei Cheng

Magnetic polyoxometalates (POMs) are obtained by a simple sonication between functionalized magnetic nanoparticles and polyoxometalates. This material can be used not only as a highly active acid catalyst, but also as a catalyst support for chiral amines.

Journal: :Chemistry: A European Journal 2021

Polyoxometalates (POMs) can act as unique reservoirs for multiple electron transfers. As POMs display only weak absorption in the visible spectrum, they be associated with chromophores such porphyrins and porphyrin antennae. In this Minireview, research dedicated to combination of polyoxometalates is put context state art identifying challenges addressed optimization hybrid materials applicatio...

Journal: :Dalton transactions 2013
Yong-Chao Liu Chun-Hua Fu Shou-Tian Zheng Jun-Wei Zhao Guo-Yu Yang

Three novel polyoxometalates (POMs) containing [Ni6(μ3-OH)3](9-) and [P2W15O56](12-) units were first made, showing the first hexa-nuclearity transition-metal substituted POMs (TMSPs) based on monomeric lacunary Dawson fragments, which further indicates that the hydrothermal technique can offer an effective way for making new TMSPs through lacunary POM fragments incorporated with high-nuclear T...

Journal: :Dalton transactions 2015
Ryo Ishimoto Keigo Kamata Kosuke Suzuki Kazuya Yamaguchi Noritaka Mizuno

Chiral ligand-modified polyoxometalates (POMs) were successfully synthesized by the introduction of BINOL into the dititanium-substituted POM in an organic medium and characterized by X-ray crystallography, spectroscopy, and elemental analyses. These BINOL-modified POMs were stable in the solution state and showed catalytic activity for asymmetric oxidation of thioanisole.

Journal: :iranian journal of catalysis 2011
hamid aliyan razieh fazaeli ahmad reza massah hamid javaherian naghash saeed moradi

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.

Journal: :Chemical communications 2012
Yifeng Wang Offer Zeiri Louisa Meshi Francesco Stellacci Ira A Weinstock

Electrostatically stabilized monolayer shells of metal-oxide cluster anions (polyoxometalates, or POMs) on the surfaces of ca. 8 nm tetrahedral and octahedral gold nanocrystals regioselectively direct water-soluble alkanethiolate ligands to the corners and edges of the gold polyhedra.

2015
Greta R. Patzke

We are delighted to introduce this special issue of Inorganics. This themed issue is dedicated to polyoxometalates (POMs) as an outstanding class of oxo-cluster materials. Polyoxometalates have fascinated generations of researchers since the mid-18th-century, and they continue to attract promising young scientists all over the world. Since the first pioneering studies, the manifold structures a...

2018
Aleksandar Bijelic Manuel Aureliano Annette Rompel

Polyoxometalates (POMs) are, mostly anionic, metal oxide compounds that span a wide range of tunable physical and chemical features rendering them very interesting for biological purposes, an continuously emerging but little explored field. Due to their biological and biochemical effects, including antitumor, -viral and -bacterial properties, POMs and POM-based systems are considered as promisi...

Journal: :Dalton transactions 2016
Ahmed Al-Yasari Nick Van Steerteghem Hani El Moll Koen Clays John Fielden

We show that polyoxometalates (POMs) are an excellent redox-active acceptor on which to base high performance 2(nd) order non-linear optical (NLO) chromophores. This is demonstrated through three new organoimido-Lindqvist derivatives with HRS β0-values exceeding those of any dipolar organic system with comparable donor, π-system and absorption profile. Thus, organoimido POMs may provide a new g...

Journal: :Scientific reports 2016
Yichao Huang Jiangwei Zhang Jian Hao Yongge Wei

Organoimidoylization of Polyoxometalates (POMs) can dramatically modify the electronic structures of POMs and gives rise to novel "value-adding" properties of the POMs for promising material applications including photo-electronic transformation and catalysis. To date, the preparation of multi-functionalized organoimido derivatives of POMs is generally conducted under strict condition and is ti...

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