Výsledky vyhledávání - "Jocelyne Maquet"

Assembling Vanadium(V) Oxide and Gelatin into Novel Bionanocomposites with Unexpected Rubber-like Properties

Autor: Florent Carn, Marc Schmutz, Nathalie Steunou, Bruno Fayolle, Gervaise Mosser, Jacques Livage, Thibaud Coradin, Olivier Durupthy, Jocelyne Maquet

Publikováno v: Chemistry of Materials
Chemistry of Materials, 2009, 22 (07), pp.398-408. ⟨10.1021/cm902836g⟩
Chemistry of Materials, American Chemical Society, 2009, 22 (07), pp.398-408. ⟨10.1021/cm902836g⟩

A new kind of bionanocomposites is prepared for the first time in soft conditions by a complex coacervation process and consists of an assembly of decavanadate polyanions and gelatin chains in triple helices and coils conformation. Before drying, wel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c14789238f50d08d3b5a81c182e7a811
https://doi.org/10.1021/cm902836g

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Identification of the OH groups responsible for kinetic basicity on MgO surfaces by 1H MAS NMR

Autor: Jocelyne Maquet, Guylène Costentin, Hugo Petitjean, Michel Che, Hélène Lauron-Pernot, Christian Bonhomme, Céline Chizallet

Publikováno v: Journal of Catalysis
Journal of Catalysis, Elsevier, 2009, pp.175-179. ⟨10.1016/J.jcat.2009.09.003⟩
Journal of Catalysis, 2009, pp.175-179. ⟨10.1016/J.jcat.2009.09.003⟩

Depending on the localization of hydroxyl groups on MgO surface irregularities, their topology and coordination can differ. In order to discriminate their reactivity, three MgO samples with different morphologies are hydroxylated at various levels. F

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2612818caa487376379ffa904436060e
https://doi.org/10.1016/j.jcat.2009.09.003

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Study of the Structure of OH Groups on MgO by 1D and 2D 1H MAS NMR Combined with DFT Cluster Calculations

Autor: Françoise Delbecq, Guylène Costentin, Jocelyne Maquet, Christian Bonhomme, Michel Che, Hélène Lauron-Pernot, Philippe Sautet, Céline Chizallet

Publikováno v: Journal of Physical Chemistry C
Journal of Physical Chemistry C, American Chemical Society, 2007, 111 (49), pp.18279-18287. ⟨10.1021/jp077089g⟩
Journal of Physical Chemistry C, 2007, 111 (49), pp.18279-18287. ⟨10.1021/jp077089g⟩

Complex 1H MAS NMR spectra of hydroxylated MgO powders have been assigned by combining DFT embedded cluster calculations and experiments using single pulse, Hahn-echo, and 2D NOESY like sequences. Chemical shifts calculations suggest the qualitative

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82b776459a1cd36860ecc676ebd396d0
https://doi.org/10.1021/jp077089g

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1H MAS NMR study of the coordination of hydroxyl groups generated upon adsorption of H2O and CD3OH on clean MgO surfaces

Autor: Guylène Costentin, Michel Che, Jocelyne Maquet, Hélène Lauron-Pernot, Céline Chizallet

Publikováno v: Applied Catalysis A : General
Applied Catalysis A : General, Elsevier, 2006, 307, pp.239-244. ⟨10.1016/j.apcata.2006.03.056⟩
Applied Catalysis A : General, 2006, 307, pp.239-244. ⟨10.1016/j.apcata.2006.03.056⟩

The coordination of OH groups on MgO has been characterized by 1H MAS NMR after appropriate pre-treatment conditions to obtain surfaces free from carbonates and with a controlled degree of hydroxylation. On MgO-sol–gel sample treated at 1023 K unde

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b130de2cdb6cc6bc93dad329ada3cf13
https://doi.org/10.1016/j.apcata.2006.03.056

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More insight in the structure of silicophosphate gels by 31P–29Si CP MAS multidimensional experiments and 1H–31P–29Si triple resonance experiments

Autor: Cristina Coelho, Jocelyne Maquet, Christian Bonhomme, Thierry Azaïs, Laure Bonhomme-Coury

Publikováno v: Comptes Rendus Chimie. 9:472-477

Solid-state 29 Si, 31 P MAS and CP MAS NMR and X-ray powder diffraction have been used to study phosphosilicate gels of molar composition (TEOS/H 3 PO 4 = 1) treated under various temperature conditions. It was found that the gel treated at 100 °C f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::150cab10a46ed5b426d4b6eda932c1ac
https://doi.org/10.1016/j.crci.2005.06.025

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31P and 51V MAS-NMR Characterisation of Mixed Vanadium and Titanium Phosphates Prepared from Molecular Precursors

Autor: Jacques Livage, Philippe Barboux, S. A. Ennaciri, C. R'kha, Jocelyne Maquet

Publikováno v: Journal of Sol-Gel Science and Technology. 34:197-203

Coprecipitation of mixed vanadium and titanium phosphates has been performed by reacting a mixed solution of vanadium alkoxide (VO(OPrn)3) and titanium alkoxide (Ti(OPrn)4) with anhydrous phosphoric acid (H3PO4). The goal is to obtain a mixture at a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::37c647cd9fa07649ea04db7feee7462e
https://doi.org/10.1007/s10971-005-1368-3

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Influence of pH and ionic strength on vanadium(v) oxides formation. From V2O5·nH2O gels to crystalline NaV3O8·1.5H2O

Autor: Jocelyne Maquet, Christian Bonhomme, Jacques Livage, Thibaud Coradin, Nathalie Steunou, Olivier Durupthy

Publikováno v: J. Mater. Chem.. 15:1090-1098

Na+ and TMA+ intercalated M0.3V2O5·1.5H2O (M = Na+ and TMA+) precipitates have been synthesized by adding chloride salts MCl or bases MOH to a metavanadate solution which was acidified using a proton exchange resin. As evidenced by X-ray diffraction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd1c30b027ff5dce182c9d93ef0aa56c
https://doi.org/10.1039/b414893b

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Synthesis, characterization and applications of polysiloxane networks with immobilized pyrogallol ligands

Autor: Mohamed M. Chehimi, Nizam M. El-Ashgar, Florence Babonneau, Jocelyne Maquet, Issa M. El-Nahhal, Salman M. Saadeh

Publikováno v: Applied Organometallic Chemistry. 19:759-767

A porous, solid insoluble polysiloxane‐immobilized ligand system bearing pyrogallol active sites of the general formula P(CH2)3NH(CH2)3OC6H3(OH)2 (where P represents [SiO]n siloxane network) has been prepared by the reaction of 3‐aminopr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca7c8783808d27842656b09a90649147
https://doi.org/10.1002/aoc.888

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11B and 15N solid state NMR investigation of a boron nitride preceramic polymer prepared by ammonolysis of borazine

Autor: Florence Babonneau, Christophe Duriez, Jocelyne Maquet, Eric Framery, Michel Vaultier, Christel Gervais

Publikováno v: Journal of the European Ceramic Society. 25:129-135

A poly(aminoborazine), precursor for hexagonal boron nitride (h-BN) obtained by reaction of borazine B 3 N 3 H 6 with ammonia, and its pyrolysis derivatives have been extensively characterised by 15 N and 11 B MAS NMR. The various B and N sites have

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::adcb7993cb997d0d2bfa724fb2de29e7
https://doi.org/10.1016/j.jeurceramsoc.2004.07.010

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Advances in Characterisation Methods for Sol-Gel Derived Materials: High Resolution Solid State Nuclear Magnetic Resonance

Autor: Christel Gervais, Jocelyne Maquet, Florence Babonneau, Christian Bonhomme

Publikováno v: Journal of Sol-Gel Science and Technology. 31:9-17

The objective of this paper is to discuss the recent advances in high resolution solid state Nuclear Magnetic Resonance (NMR) to characterise sol-gel derived materials. The first part will be focused on methods to describe M i --O--M j connectivities

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5dae360e9aba2ca4a2699dc2110ff5aa
https://doi.org/10.1023/b:jsst.0000047953.77510.0b

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