Laboratoire de réactivité de surface

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  • Article dans une revue

Immobilization of polyoxometalate hybrid catalysts onto mesoporous silica supports using phenylene diisothiocyanate as a cross-linking agent

Ourania Makrygenni, Dalil Brouri, Anna Proust, Franck Launay, Richard Villanneau

The hybrid derivative of heteropolytungstate bearing two aniline groups, namely (nBu4N)3[NaHPW9O34{As(O)C6H4NH2}2], was post-functionalized in the presence of 1,4-phenylene diisothiocyanate (PDITC). The resulting molecular moiety was characterized by IR, 1H and 31P NMR spectroscopy. In a second…

Microporous and Mesoporous Materials, 2018, 278, pp.314-321. ⟨10.1016/j.micromeso.2018.11.036⟩. ⟨hal-02143825⟩

  • Article dans une revue

Halide-free CO 2 cycloaddition onto styrene oxide catalysed by first row transition-metal derivatives of polyoxotungstates

Jingjing Ren, Franck Launay, Richard Villanneau, Anna Proust

Quaternary ammonium salts of metal derivatives of polyoxometalates [XW11O39M(H2O)]n- (X = P, Si; M = Cr, Mn, Co, Ni, Zn) were successfully tested instead of quaternary ammonium halides as catalysts in the cycloaddition of CO2 to styrene oxide. Remarkably, they gave very satisfactory yields of…

Chemical Communications, 2024, ⟨10.1039/D4CC00522H⟩. ⟨hal-04545491⟩

  • Article dans une revue

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO 2 Cycloaddition onto Epoxides

Matthieu Balas, Sébastien Beaudoin, Anna Proust, Franck Launay, Richard Villanneau

NiII and MnIII Schiff base complexes (Salophen-Ni and Salophen-MnCl) bearing a pending carboxylic group were prepared and characterized. Both complexes were grafted onto a mesoporous amino-functionalized SBA-15 silica, by formation of an amide function between the propylamine groups of the support…

European Journal of Inorganic Chemistry, 2021, 2021 (16), pp.1581-1591. ⟨10.1002/ejic.202100150⟩. ⟨hal-03485785⟩

  • Article dans une revue

Homogeneous Supported Monolayer from Microbial Glycolipid Biosurfactant

Niki Baccile, Anyssa Derj, Cedric Boissiere, Vincent Humblot, Ariane Deniset-Besseau

The development of supported glycosylated lipid layers is an important trend in the field of glyconanomaterials for their interest in understanding sugar-sugar and protein-sugar interactions, these being at the core of cellular, bacterial or viral adhesion. The conventional self-assembled monolayer…

Journal of Molecular Liquids, 2022, 345 (117827), ⟨10.1016/j.molliq.2021.117827⟩. ⟨hal-03149331⟩

  • Article dans une revue

Acidic Properties of Alkaline-Earth Phosphates Determined by an Experimental-Theoretical Approach

E. Blanco, Q. Gu, J. Couble, L. Martin, T. Onfroy, G. Costentin, Jean-Francois Paul, Carine Michel, S. Loridant

Alkaline-earth phosphates efficient in the dehydration of lactic acid to acrylic acid were previously shown to contain a surface mono/dihydrogen phosphate amorphous layer composed of M2+ cations and both P═O and POH groups. In this work, acidic properties of such a layer were determined combining…

Journal of Physical Chemistry C, 2020, 124 (3), pp.2013-2023. ⟨10.1021/acs.jpcc.9b10472⟩. ⟨hal-02472130⟩

  • Article dans une revue

Dimerization of Uracil in a simulated Mars-like UV radiation environment

Laura Rouquette, Fabien Stalport, Hervé Cottin, Cyril Colas, Thomas Georgelin, Naïla Chaouche-Mechidal, Jerome Lasne, Sara Mahfouf, Franćois Raulin, Laura Selliez, Cyril Szopa, Patrice Coll

The search for organic molecules at the surface of Mars is a key objective in astrobiology, given that many organic compounds are possible biosignatures and their presence is of interest with regard to the habitability of Mars. Current environmental conditions at the martian surface are harsh and…

Astrobiology, 2020, 20 (11), pp.1363-1376. ⟨10.1089/ast.2019.2157⟩. ⟨hal-03032302⟩

  • Thèse

Gold surface nanostructuring for separation and sensing of biomolecules, Nanostructuration des surfaces d'or pour la séparation et la détection de biomolécules

Erin Bedford

Detecting biomolecules in physiological environments is critical to health care and environmental monitoring. In this work, we study and use gold surfaces for biomolecule detection while incorporating nanoscale components—specifically, self-assembled monolayers (SAMs) of alkanethiols and gold…, La détection de molécules biologiques dans les environnements physiologiques est essentielle aux soins de santé et la surveillance de l'environnement. Dans ces travaux de thèse, nous étudions et utilisons des surfaces d'or pour la détection de biomolécules, avec l'inclusion de…

Chemical Physics [physics.chem-ph]. Université Pierre et Marie Curie - Paris VI; University of Waterloo (Canada), 2016. English. ⟨NNT : 2016PA066527⟩. ⟨tel-01529577⟩

  • Article dans une revue

The controlled synthesis of metal-acid bifunctional catalysts: The effect of metal:acid ratio and metal-acid proximity in Pt silica-alumina catalysts for n-heptane isomerization

Jadid E Samad, Juliette R Blanchard, Celine R Sayag, Catherine R Louis, John R Regalbuto

Several series of metal-acid bifunctional catalysts with controlled metal:acid ratios and metal site-acid site proximity were evaluated for n-heptane isomerization. Through the study of metal deposition reported in the companion paper, proximity could be achieved at four distinct scales: atomic,…

Chinese Journal of Catalysis, 2016, 342, pp.203 - 212. ⟨10.1016/j.jcat.2016.08.004⟩. ⟨hal-01443956⟩

  • Article dans une revue

Insights into the WOx Coverage-Dependent Location and Oxidation State of Noble Metals Supported on Tungstated Oxides: The Case of Rh/WOx−Ce0.62Zr0.38O2

Thomas Bonnotte, Rachel P. Doherty, Céline Sayag, Jean-Marc Krafft, Christophe Méthivier, Mickaël Sicard, Frédéric Ser, Cyril Thomas

Noble metals-promoted tungstated oxides have been shown to be profitable in a wide variety of catalytic reactions of environmental interest but to be detrimental in the hydrogenation of aromatics. The origin of the deleterious effect of tungstates on the hydrogenation performance of noble metals is…

Journal of Physical Chemistry C, 2014, 118, pp.7386−7397. ⟨10.1021/jp410848f⟩. ⟨hal-00979525⟩

  • Thèse

Préparation de nanoparticules de rhodium(0) sur support mésoporeux assistée par des sels d'ammonium quaternaires : Application à la catalyse d'hydrogénation asymétrique d'arènes prochiraux, Preparation of rhodium (0) nanoparticles on mesoporus support assisted by quaternary ammonium salts : application to asymmetric hydrogenation of prochiral arenes

Rita Sassine

Ces travaux de thèse visent à développer de nouveaux catalyseurs associant les activités prometteuses des nanoparticules de Rh(0) et l'effet de confinement des supports mésoporeux pour des applications en hydrogénation asymétrique dans l'eau. Des particules ont été préparées par réaction…, This thesis aims to develop new catalysts combining Rh(0) nanoparticles with promising activities and the confinement effect of mesoporous materials for applications in asymmetric hydrogenation in water. Particles were prepared by the reaction of NaBH4 with RhCl3, directly, within silicic (SBA-15)…

Génie des procédés. Université Pierre et Marie Curie - Paris VI, 2012. Français. ⟨NNT : 2012PA066053⟩. ⟨tel-00834363⟩