Výsledky vyhledávání - "Geneviève Chottard"

Another Example of the Instability of a Keggin‐Type Heteropolyanion in the Presence of Aqueous Hydrogen Peroxide: From [AsW 12 O 40 ] 3– to Low‐Nuclearity Oxoperoxotungstates – Crystal Structure of [( n Hex) 4 N] 3 [AsO 4 {W 2 O 2 (μ‐O 2 ) 2 (O 2 ) 2 } 2 ]

Autor: Jean-Marie Brégeault, Patrick Herson, Jean-Yves Piquemal, Chehrazed Ahcine, Geneviève Chottard, Laurent Salles

Publikováno v: European Journal of Inorganic Chemistry. 2006:939-947

The Keggin dodecatungstoarsenato anion of HNa2[AsW12O40] is inherently unstable in aqueous hydrogen peroxide and is mainly degraded to [AsO4{W2O2(-O2)2(O2)2}2]3-, [HAsO4{W2O2(-O2)2(O2)2}]2- and [{WO(O2)2(H2O)}2(-O)]2-. These anions were isolated as s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba0ad9b728c102b50f276c1e607d35b8
https://doi.org/10.1002/ejic.200500758

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Characterisation of as-synthesised MOx–MCM-41 (M=Mo, W) mesophases using Raman spectrometry and 29Si MAS NMR

Autor: Geneviève Chottard, Jean-Yves Piquemal, J.-M. Manoli, Emmanuel Briot, P. Tougne, Jean-Marie Brégeault

Publikováno v: Microporous and Mesoporous Materials. 58:279-289

MCM-41 mesostructured silicas containing molybdenum and tungsten have been prepared in an acidic medium at room temperature. Two procedures were considered: the so-called oxo–peroxo route with low-nuclearity peroxo metal precursors (route A) and th

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https://doi.org/10.1016/s1387-1811(02)00654-6

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Chemical Reactions Between Copper Pigments and Oleoresinous Media

Autor: Jean-Claude Chottard, Jean-Jacques Girerd, Eric Rivière, Geneviève Chottard, Michèle Gunn

Publikováno v: Studies in Conservation. 47:12-23

study demonstrates that resin and fatty acids are able to extract copper(II) ions from verdigris (copper acetate) and verditer (basic copper carbonate). Ligand exchange reactions of basic copper carbonate with fatty acids and resin acids are much slo

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https://doi.org/10.1179/sic.2002.47.1.12

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Synthesis, Structure and Characterization of the New Complex [L1(H2O)Fe(μ-O)Fe(OH2)L1]4+ [L1 =N,N′-Bis(1-methylimidazolyl-2-methyl)-N,N′-Bismethyl-1,2-ethanediamine] − Formation of the (μ-O)(μ-H3O2) Complex upon Deprotonation

Autor: Luba Tchertanov, Eric Rivière, Jean Guilhem, Geneviève Chottard, Jean-Jacques Girerd, Sandrine Poussereau, Geneviève Blondin

Publikováno v: European Journal of Inorganic Chemistry. 2001:1057-1062

The compound [L1(H2O)Fe(μ-O)Fe(OH2)L1](ClO4)4·2H2O [1(ClO4)4·2H2O] [L1 = N,N′-bis(1-methylimidazolyl-2-methyl)-N,N′-bismethyl-1,2-ethanediamine] was synthesized. It is characterized by a linear Fe−(μ-O)−Fe motif with an Fe···Fe distanc

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https://doi.org/10.1002/1099-0682(200104)2001:4<1057::aid-ejic1057>3.0.co

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Aqueous acidic hydrogen peroxide as an efficient medium for tungsten insertion into MCM-41 mesoporous molecular sieves with high metal dispersion

Autor: Jean-Yves Piquemal, Maxence Vennat, Emmanuel Briot, J.-M. Manoli, Geneviève Chottard, Jean-Marie Brégeault

Publikováno v: Journal of Materials Chemistry. 10:953-958

Two sets of WOx/SiO2-MCM-41 precatalysts (A and B) were prepared and compared. Tungsten-containing MCM-41 mesoporous molecular sieves have been synthesized with tetraethyl orthosilicate and tungsten precursors, tungstic acid, 'H2WO4', or sodium tungs

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https://doi.org/10.1039/a908428b

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O2 Activation and Aromatic Hydroxylation Performed by Diiron Complexes

Autor: Jacqueline Dumats, Marc Fontecave, Georges Hussler, Michel Seite, Stéphane Ménage, Geneviève Chottard, Isabelle Gautier Luneau, Jean-Baptiste Galey

Publikováno v: Journal of the American Chemical Society. 120:13370-13382

Chemical models of active sites of diiron oxo proteins have been synthesized. The polydendate ligands are EDTA derivatives which provide a balanced supply of nitrogen atoms and carboxylate groups t...

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https://doi.org/10.1021/ja981123a

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Synthesis, Structure, and Characterization of the New [L(OH)Fe(μ-O)Fe(OH2)L]3+ Complex (L = N,N‘-Dimethyl-N,N‘-bis(2-pyridylmethyl)ethane-1,2-diamine). Detection of an Equilibrium with the Protonated Diamond Form [LFe(μ-O)(μ-OH)FeL]3+ in Acetonitrile

Autor: Jean Guilhem, Sandrine Poussereau, Geneviève Blondin, Michèle Cesario, Geneviève Chottard, Florence Gonnet, Jean-Jacques Girerd

Publikováno v: Inorganic Chemistry. 37:3127-3132

The complex [L(H2O)Fe(μ-O)Fe(OH)L](ClO4)3·H2O, where L = N,N‘-dimethyl-N,N‘-bis(2-pyridylmethyl)ethane-1,2-diamine, was synthesized. It crystallizes in the orthorhombic space group P212121 with a = 13.283(5) A, b = 16.050(9) A, c = 20.050(9) A,

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https://doi.org/10.1021/ic971589e

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Engineering, expression and biochemical characterization of the hemoglobin domain of a Erwinia chrysanthemi flavohemoprotein

Autor: Constantin T. Craescu, Michael C. Marden, Gilles Labesse, Serge Pin, Martine Boccara, Geneviève Chottard, Jean-Paul Mornon, Joël Mispelter, Eric Forest

Publikováno v: European Journal of Biochemistry. 253:751-759

An artificial hemoglobin-like domain has been constructed by engineering the gene coding for the multi-domain flavohemoprotein from the bacterium Erwinia chrysanthemi. This domain was designed by molecular modelling, cloned and over-expressed in Esch

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https://doi.org/10.1046/j.1432-1327.1998.2530751.x

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Synthesis, Structural, Magnetic, and Redox Properties of Asymmetric Diiron Complexes with a Single Terminally Bound Phenolate Ligand. Relevance to the Purple Acid Phosphatase Enzymes

Autor: Elisabeth Lambert, Geneviève Chottard, Michel Bardet, Jean Marc Latour, Azzedine Bousseksou, Alain Deronzier, Jean-Pierre Tuchagues, Jean Laugier, Barbara Chabut, Sylvie Chardon-Noblat

Publikováno v: Journal of the American Chemical Society. 119:9424-9437

New asymmetrical ligands (H2L) have been synthesized to provide both a bridging and a terminal phenolate to a pair of iron ions in order to mimic the binding of a single terminal tyrosinate at the diiron center of the purple acid phosphatases. H2L1 i

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https://doi.org/10.1021/ja970345q

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Molecular Shape, Dissociation, and Oxygen Binding of the Dodecamer Subunit of Lumbricus terrestris Hemoglobin

Autor: Serge N. Vinogradov, Askar R. Kuchumov, Roy E. Weber, Geneviève Chottard, Pawan K. Sharma, Peter Zipper, Angelica Krebs, Emory H. Braswell

Publikováno v: Journal of Biological Chemistry. 271:18695-18704

Small angle x-ray scattering of the 213-kDa dodecamer of Lumbricus terrestris Hb yielded radius of gyration = 3.74 +/- 0.01 nm, maximum diameter = 10.59 +/- 0.01 nm, and volume = 255 +/- 10 nm3, with no difference between the oxy and deoxy states. Se

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https://doi.org/10.1074/jbc.271.31.18695

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