mesostructured porous materials: pore and surface engineering towards bio-inspired synthesis of heterogeneous copper catalysts

Kun Zhang 1, 2
2 ARENAIRE - Computer arithmetic
Inria Grenoble - Rhône-Alpes, LIP - Laboratoire de l'Informatique du Parallélisme
Abstract : Advanced control of the surface structure and chemistry in confined space has been developed here in mesostructured porous silicas of MCM-41 type to design novel metal supported catalysts combining confinement, hydrophobicity and site specificity using the inspiring model of metalloproteins. First, it is demonstrated that the surface of such a type of materials usually seen as smooth has indeed an alveolar structure generated by the imprint of the ammonium surfactant head groups used here as directing agent. Increasing hydrothermal temperatures is shown first to enlarge the pore size by mere surface smoothing followed by a decrease explained by wall thickening. In addition, conditions were found to generate hybrid materials with hierarchical micro- and mesoporority. Finally, both rough and smooth surfaces were found amenable for multifonctionnalization using molecular stencil patterning technique and compared for isolation of bidentate aminoethyleaminopropyl tethers by trimethylsilyl grafted hydrophobic groups. Then copper (II) can easily be retained by complexation to these bidentate tethers inside the nanochannels of the material.
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Kun Zhang. mesostructured porous materials: pore and surface engineering towards bio-inspired synthesis of heterogeneous copper catalysts. Chemical Sciences. Ecole normale supérieure de lyon - ENS LYON, 2008. English. ⟨tel-00310153⟩

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