Publications (6)32.43 Total impact
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Article: Energetic performances of the metal-organic framework ZIF-8 obtained using high pressure water intrusion-extrusion experiments.
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ABSTRACT: The "ZIF-8-water" system displays reproducible shock-absorber behaviour over several cycles with a stored energy of 13.3 J g(-1) and an energy yield close to 85%. The combination of the main features evidenced for ZIF-8, i.e. a quite low intrusion pressure and a high stored energy, opens a field for new applications.Physical Chemistry Chemical Physics 02/2013; · 3.57 Impact Factor -
Article: Comparison of the behavior of metal-organic frameworks and zeolites for hydrocarbon separations.
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ABSTRACT: The objective of this work was to study the adsorption and separation of the most important families of hydrocarbon compounds on metal-organic frameworks (MOFs), in comparison with zeolites. For this purpose, we have selected four probe molecules, each of them representing one of these families, i.e., o- and p-xylene as aromatics, 1-octene as an alkene, and n-octane as an alkane. The separation of these four molecules was studied by binary breakthrough experiments. To represent the large diversity of MOF structures, the experiments were carried out with (i) two MOFs with coordinatively unsaturated metal sites (CUS), i.e., Cu-btc (HKUST-1) and CPO-27-Ni, (ii) a MOF with an anionic framework and extraframework cations, i.e. RHO-ZMOF, and (iii) two rather apolar zeolitic imidazolate framework (ZIF) materials with different pore sizes, i.e. ZIF-8 and ZIF-76. Zeolite NaY and zeolite β were used as polar and apolar reference adsorbents, respectively. The results can be briefly summarized as follows: ZIFs (not carrying any polar functional groups) behave like apolar adsorbents and exhibit very interesting and unexpected molecular sieving properties. CUS-MOFs behave like polar adsorbents but show the specificity of preferring alkenes over aromatics. This feature is rationalized thanks to DFT+D calculations. MOFs with extraframework cations behave like polar (cationic) zeolites.Journal of the American Chemical Society 03/2012; 134(19):8115-26. · 9.91 Impact Factor -
Article: Adsorption of CO(2), CH(4), and N(2) on zeolitic imidazolate frameworks: experiments and simulations.
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ABSTRACT: Experimental measurements and molecular simulations were conducted for two zeolitic imidazolate frameworks, ZIF-8 and ZIF-76. The transferability of the force field was tested by comparing molecular simulation results of gas adsorption with experimental data available in the literature for other ZIF materials (ZIF-69). Owing to the good agreement observed between simulation and experimental data, the simulation results can be used to identify preferential adsorption sites, which are located close to the organic linkers. Topological mapping of the potential-energy surfaces makes it possible to relate the preferential adsorption sites, Henry constant, and isosteric heats of adsorption at zero coverage to the nature of the host-guest interactions and the chemical nature of the organic linker. The role played by the topology of the solid and the organic linkers, instead of the metal sites, upon gas adsorption on zeolite-like metal-organic frameworks is discussed.Chemistry 12/2009; 16(5):1560-71. · 5.93 Impact Factor -
Article: IM-19: a new flexible microporous gallium based-MOF framework with pressure- and temperature-dependent openings.
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ABSTRACT: Five metal-organic frameworks (MOFs) based on the same three-dimensional gallium terephthalate network (IM-19) are described, and an incommensurate structure (for the as-synthesized form) as well as two remarkable guest-free polymorphs (open and closed) are highlighted.Physical Chemistry Chemical Physics 08/2009; 11(26):5241-5. · 3.57 Impact Factor -
Article: Template assisted design of microporous gallium nitride materials.
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ABSTRACT: For the first time the synthesis of a porous gallium nitride material (GaN1.15H1.18O0.06C0.04) with narrow pore size distribution in the micropore regime using a nonylamine assisted sol-gel route is reported. The yellow solid has a very high micropore volume of 0.176 cm3 g(-1) comparable to that of zeolitic solids.Chemical Communications 04/2003; · 6.17 Impact Factor -
Article: Synthesis of a new 2D fluorogallophosphate intercalated by double organic sheets of morpholine
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ABSTRACT: One way to obtain new materials is to exploit the in situ generation of the structure-directing agent. By this synthetic route, solvents or precursors of the templates are introduced into the starting mixtures, and during the synthesis, they partly decompose into molecules that act as templates. This paper deals with the synthesis of a fluorogallophosphate with a new template precursor, the N-formylmorpholine. This compound, used as main solvent, is unstable in acidic media. At high temperature it decomposes and generates in situ the morpholine molecules. We report the structure of a two-dimensional fluorogallophosphate named Mu-38 structurally related to ULM-9. This compound Ga3P3O12F3[C4H10NO]3 (Z = 4) consists of anionic inorganic layers containing single four rings units linked and charge-balanced by protonated morpholine. It was also characterized by powder XRD, SEM, elemental and thermal analyses, and solid state NMR spectroscopy (13C, 19F and 31P MAS and 31P CP MAS experiments).Microporous and Mesoporous Materials 114:82-92. · 3.29 Impact Factor
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Institutions
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2009–2013
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Université de Haute-Alsace
- Institut de Science des Matériaux de Mulhouse : IS2M
Mulhouse, Alsace, France
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2003
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Max-Planck-Institut für Kohlenforschung
Mülheim an der Ruhr, North Rhine-Westphalia, Germany
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