نتایج جستجو برای: polyoxometalate

تعداد نتایج: 904  

2014
William J. Gault Balázs Enyedi Philipp Niethammer

The Rockefeller University Press $30.00 J. Cell Biol. Vol. 207 No. 6 767–782 www.jcb.org/cgi/doi/10.1083/jcb.201408049 JCB 767 Correspondence to Philipp Niethammer: [email protected] Abbreviations used in this paper: Akt-PH, Akt-pleckstrin homology domain; ATPS, adenosine 5-[-thio] triphosphate tetralithium salt; dpf, days postfertilization; ENTPD, ecto-nucleoside triphosphate diphosphohydr...

Journal: :Journal of the American Chemical Society 2008
Andrea Sartorel Mauro Carraro Gianfranco Scorrano Rita De Zorzi Silvano Geremia Neal D McDaniel Stefan Bernhard Marcella Bonchio

Solid state and solution evidence confirms the embedding of an adamantane-like, Ru4O6 fragment by the divacant, gamma-decatungstosilicate ligand. The resulting complex catalyzes water oxidation to oxygen with TON up to 500 and TOF > 450 h-1.

2010
Tie-Jun Cai Xiao-Ming Shen Zhen-Shan Peng Qian Deng

(C5H7N2)3(AsMo12O40)·2C5H6N2·1.5H2O was hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. Crystal data: monoclinic, P21/n, a = 13.310(3), b = 22.399(5), c = 19.820(4) Å, β = 99.99(3) ◦, V = 5819(2) Å3, Z = 1, wR(F2) = 0.1345. The structure consists of Keggin-type [AsMo12O40]3− polyoxoanions. The title compound has a high catalytic activity for the ox...

2007
Adina Haimov Ronny Neumann Rafael Berger

A cross-linked polyethyleneimine polymer containing the[ZnWZn2(H2O)2(ZnW9O34)2] poly-oxometalate was prepared from branched polyethyleneimine(Mw ) 600), the polyoxometalate, and an-octylamine-epichlorohydrin cross-linking reagent. This catalytic assembly was active for the selectiveoxidation of 2-alkanols to 2-alkanones with aqueous H2O2 with reactions presumably occurring a...

Journal: :Dalton transactions 2010
Paul Kögerler Boris Tsukerblat Achim Müller

The structural versatility characterizing polyoxometalate chemistry, in combination with the option to deliberately use well-defined building blocks, serves as the foundation for the generation of a large family of magnetic clusters, frequently comprising highly symmetric spin arrays. If the spin centers are coupled by antiferromagnetic exchange, some of these systems exhibit spin frustration, ...

Journal: :The journal of physical chemistry. A 2006
Tom Waters Xin Huang Xue-Bin Wang Hin-Koon Woo Richard A J O'hair Anthony G Wedd Lai-Sheng Wang

Two polyoxometalate Keggin-type anions, alpha-PM12O40(3-) (M = Mo, W), were transferred to the gas phase by electrospray; their electronic structure and stability were probed by photoelectron spectroscopy. These triply charged anions were found to be highly stable in the gas phase with large adiabatic electron detachment energies of 1.7 and 2.1 eV for M = Mo and W, respectively. The magnitude o...

Journal: :Soft matter 2015
Ming-Ming Su Hai-Kuan Yang Li-Jun Ren Ping Zheng Wei Wang

We report the formation of solvent-mediated gels as well as their hierarchical structures and rheological properties. The gelator used is a hybrid with a molecular structure of cholesterol-polyoxometalate-cholesterol, in which the cholesterol dissolves well in toluene and N,N-dimethylformamide (DMF), whereas the polyoxometalate cluster dissolves only in DMF. These solubility differences enable ...

Journal: :Dalton transactions 2015
Liam S Sharninghausen Brandon Q Mercado Robert H Crabtree David Balcells Jesús Campos

The two title clusters were formed during iridium-catalyzed glycerol dehydrogenation and display a remarkably high NHC content. They were crystallized in either agarose or polyethylene oxide gel matrices, while more conventional crystallization techniques proved unsuccessful. Cluster [Ir4(IMe)8H9](3+), with a net charge of +3, was only crystallizable with a polyoxometalate Keggin trianion. The ...

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