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Supramolecular Self‐Assembly and Organization of Collagen at Solid/Liquid Interface: Effect of Spheroid‐ and Rod‐Shaped TiO 2 Nanocrystals

Mathieu Beauvais, Thomas Degabriel, Nesrine Aissaoui, Vincent Dupres, Elodie Colaço, Karim El Kirat, Rute F Domingos, Dalil Brouri, Claire‐marie Pradier, Jolanda Spadavecchia, Jessem Landoulsi

The adsorption behavior of collagen on solid surfaces is a process that determines the role of this protein to mediate cell–material interaction. Herein, the mechanism of self‐assembly and organization of collagen on a model substrate is investigated in the presence of TiO2 nanoparticles. In…

Advanced Materials Interfaces, 2019, 6 (14), pp.1900195. ⟨10.1002/admi.201900195⟩. ⟨hal-02391527⟩

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Hierarchical Self-Assembly of Polyoxometalate-Based Organo Palladium(II) Metallomacrocycles via Electrostatic Interactions

Raphaël Salles, Benjamin Abécassis, Etienne Derat, Dalil Brouri, Aurélie Bernard, Qichun Zhang, Anna Proust, Christophe Desmarets, Guillaume Izzet

The design and synthesis of a supramolecular square composed of polyoxometalate-based hybrid donors and ethylenediamine palladium(II) nodes are reported. The structure of the metallomacrocycle scaffold was inferred by diffusion NMR, small-angle X-ray scattering (SAXS), and molecular modeling. The…

Inorganic Chemistry, 2020, 59 (4), pp.2458--2463. ⟨10.1021/acs.inorgchem.9b03333⟩. ⟨hal-02887768⟩

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Comparison of competition between T = O and T-OH groups in vanadium, niobium, tantalum BEA zeolite and SOD based zeolites

Anna Wojtszek, Maria Zioleck, Stanislaw Dzwigaj, Frederik Tielens

The investigation of intra framework substitution of Si by group V transition metals (V, Nb, Ta) is an important strategy to modify or to tune the catalytic properties of zeolites. Theoretically one of the limitations is the size of the zeolite unit cell. In this study the energy and geometry of…

Chemical Physics Letters, 2011, 514, pp.70-73. ⟨10.1016/j.cplett.2011.08.005⟩. ⟨hal-00666258⟩

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Influence of the pretreatment conditions on the performances of CeO2-supported gold catalysts in the Catalytic Wet Air Oxidation of carboxylic acids

Ngoc D. Tran, Michèle Besson, Claude Descorme, Katia Fajerwerg, Catherine Louis

Two series of ceria-supported gold catalysts (1 and 4 wt.% Au) were prepared by deposition-precipitation with urea. Depending on the gold loading, the pretreatment of the Au/CeO2 catalysts (calcination in air vs. reduction in hydrogen) had a great influence on the oxidation state of gold, and in…

Catalysis Communications, 2011, 16, pp.98-102. ⟨10.1016/j.catcom.2011.09.014⟩. ⟨hal-00666922⟩

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Selective Modification of the Acid-Base Properties of Ceria by Supported Au

Manuela C.I. Bezen, Cornelia Breitkopf, Nadia El Kolli, Jean-Marc Krafft, Catherine Louis, J.A. Lercher

Au supported on CeO2 prepared by deposition-precipitation with urea leads to a basic catalyst. Au acts in two ways as surface modifier. First, Au selectively interacts with Ce4+ cations by either blocking access to or reducing Ce4+ to Ce3+. Second, the resulting Au atoms (presumably as Au+ ions)…

Chemistry - A European Journal, 2011, 17 (25), pp.7095-7104. ⟨10.1002/chem.201002011⟩. ⟨hal-00666903⟩

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Enhancement of the Photoinduced Oxidation Activity of a Ruthenium(II) Complex Anchored on Silica-Coated Silver Nanoparticles by Localized Surface Plasmon Resonance

Kohsuke Mori, Masayoshi Kawashima, Michel Che, Hiromi Yamashita

Angewandte Chemie International Edition, 2010, 49 (46), pp.8598-8601. ⟨10.1002/anie.201004942⟩. ⟨hal-00604784⟩

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Formation of heteropolymolybdates during the preparation of Mo and NiMo HDS catalysts supported on SBA-15: Influence on the dispersion of the active phase and on the HDS activity

Alvaro Sampieri, Stephane Pronier, Sylvette Brunet, Xavier Carrier, Catherine Louis, Juliette Blanchard, Katia Fajerwerg, Michele Breysse

Mo and Ni-Mo sulfides in SBA-15 and Al-SBA-15 catalysts were prepd. by incipient wetness co-impregnation of molybdenum and nickel precursors (followed by thermal treatment under He at 823 K) and sulfidation under 10% H2S/H2 at 673 K. Only incipient wetness impregnation of Mo on pure silica SBA-15…

Microporous and Mesoporous Materials, 2010, 130 (1-3), pp.130-141. ⟨10.1016/j.micromeso.2009.10.024⟩. ⟨hal-00604795⟩

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Ab initio study of the hydroxylated surface of amorphous silica : a representative model.

Frederik Tielens, Christel Gervais, Jean François Lambert, Francesco Mauri, Dominique Costa

A new complete, representative model for the hydroxylated surface of amorphous silica is presented and characterized by means of periodic DFT calculations. This model accounts for the experimentally encountered ring size distribution, Si-O-Si and O-Si-O angles, silanols density, and distribution (…

Chemistry of Materials, 2008, 20 (10), pp.3336-3344. ⟨10.1021/cm8001173⟩. ⟨hal-00347955⟩

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An easy way to obtain thin gold film on silica glass substrate by chemical method

Anne-Félicie Lamic-Humblot, Sandra Casale, Cédric Leger, S. Alpérine, Catherine Louis

Physical methods of metal deposition under ultra-high vacuum conditions are currently used to manufacture electrically conductive surfaces. In the case of silica glass, a supplementary oxide layer is usually required to avoid the uncontrolled growth of metal nanoparticles on the surface. Here, we…

Thin Solid Films, 2013, 539, pp.151-153. ⟨10.1016/j.tsf.2013.05.085⟩. ⟨hal-00907371⟩

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Mononuclear pseudo-tetrahedral V species of VSiBEA zeolite as the active sites of the selective oxidative dehydrogenation of propane

Karolina Chalupka, Cyril Thomas, Yannick Millot, Frédéric Averseng, Stanislaw Dzwigaj

This work reports on the investigation of the influence of the nature of the V species in the ODH of propane. For this purpose, VSiBEA catalysts, including framework and/or extra-framework V species, were synthesized via the two-step method by controlling the speciation of the V species of the…

Journal of Catalysis, 2013, 305, pp.46-55. ⟨10.1016/j.jcat.2013.04.020⟩. ⟨hal-00907796⟩