نتایج جستجو برای: three nuclearity clusters

تعداد نتایج: 1376304  

Journal: :Nanoscale 2013
Franck Bertorelle Ramzi Hamouda Driss Rayane Michel Broyer Rodolphe Antoine Philippe Dugourd Lars Gell Alexander Kulesza Roland Mitrić Vlasta Bonačić-Koutecký

We report a simple synthesis of silver:glutathione (Ag:SG) clusters using a cyclic reduction under oxidative conditions. Two syntheses are described which lead to solutions containing well-defined Ag31(SG)19 and Ag15(SG)11 clusters that have been characterized by mass spectrometry. The optical properties of silver:glutathione (Ag:SG) cluster solutions have been investigated experimentally. In p...

Journal: :Chemcatchem 2021

Nanostructuring earth-abundant metals as single atoms or clusters of controlled size on suitable carriers opens new routes to develop high-performing heterogeneous catalysts, but resolving speciation trends remains challenging. Here, we investigate the potential low-nuclearity iron catalysts in continuous liquid-phase semi-hydrogenation various alkynes. The activity depends multiple factors, in...

Journal: :Dalton transactions 2010
Marta Viciano-Chumillas Graham de Ruiter Stefania Tanase Jan M M Smits René de Gelder Ilpo Mutikainen Urho Turpeinen L Jos de Jongh Jan Reedijk

Three high-nuclearity manganese(III) clusters have been synthesized and characterized: [Mn₈(μ₄-O)₄(phpzH)₈(thf)₄] (1), [Mn₈(μ₄-O)₄(phpzH)₄(EtOH)₄]·2EtOH (2), and [Mn₆(μ₃-O)₄(μ₃-Br)₂(HphpzEt)₆(phpzEt)] (3). Compounds 1 and 2 contain a [Mn₈(μ₄-O₄)(phpzH)₈] core in which antiferromagnetic interactions between the manganese(III) ions are found. Compound 3 is a hexanuclear manganese(III) cluster in ...

Journal: :Chemical communications 2012
Iurii L Malaestean Arkady Ellern Svetlana Baca Paul Kögerler

The mixed-valent cerium(III/IV) oxide clusters {Ce(10)} and {Ce(22)}, derived from condensation reactions of cerium carboxylate coordination polymers, exhibit molecular growth tendencies similar to those of 'classical' group V and VI polyoxometalates, but with increasing nuclearity approach the structure of the parental oxide, CeO(2).

Journal: :Chemical communications 2013
Lei Chen Jiu-Yu Guo Xiao Xu Wei-Wei Ju Deng Zhang Dun-Ru Zhu Yan Xu

A novel 2-D coordination polymer constructed from high nuclearity nanosized Ho48 clusters was synthesised and structurally characterized using single-crystal X-ray analysis. The Ho48 cluster core with a charming waist drum-like structure was templated by CO3(2-) ions, and bridged by Ho-N bonds to get a 2-D coordination polymer.

Journal: :Angewandte Chemie International Edition 2006

Journal: :Journal of the American Chemical Society 2010
Matthew W Kanan Junko Yano Yogesh Surendranath Mircea Dincă Vittal K Yachandra Daniel G Nocera

A water oxidation catalyst generated via electrodeposition from aqueous solutions containing phosphate and Co(2+) (Co-Pi) has been studied by in situ X-ray absorption spectroscopy. Spectra were obtained for Co-Pi films of two different thicknesses at an applied potential supporting water oxidation catalysis and at open circuit. Extended X-ray absorption fine structure (EXAFS) spectra indicate t...

2015
Sebastian Grundner Monica A.C. Markovits Guanna Li Moniek Tromp Evgeny A. Pidko Emiel J.M. Hensen Andreas Jentys Maricruz Sanchez-Sanchez Johannes A. Lercher

Copper-exchanged zeolites with mordenite structure mimic the nuclearity and reactivity of active sites in particulate methane monooxygenase, which are enzymes able to selectively oxidize methane to methanol. Here we show that the mordenite micropores provide a perfect confined environment for the highly selective stabilization of trinuclear copper-oxo clusters that exhibit a high reactivity tow...

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