A5064791245- Metal-Organic Frameworks: Synthesis and Applications
- Zeolite Catalysis and Synthesis
- Covalent Organic Framework Applications
- X-ray Diffraction in Crystallography
- Inorganic Fluorides and Related Compounds
- Catalytic Processes in Materials Science
- Crystallization and Solubility Studies
- Chemical Synthesis and Characterization
- Polyoxometalates: Synthesis and Applications
- Catalysis and Oxidation Reactions
- Mesoporous Materials and Catalysis
- Gas Sensing Nanomaterials and Sensors
- Chemical Synthesis and Reactions
- Magnetism in coordination complexes
- Advanced Nanomaterials in Catalysis
- Advanced Photocatalysis Techniques
- Carbon Dioxide Capture Technologies
- Catalysis and Hydrodesulfurization Studies
- Layered Double Hydroxides Synthesis and Applications
- Crystallography and molecular interactions
- Advanced Chemical Physics Studies
- Lanthanide and Transition Metal Complexes
- Industrial Gas Emission Control
- Advanced NMR Techniques and Applications
- Carbon dioxide utilization in catalysis
Laboratoire Catalyse et Spectrochimie
2015-2024
Université de Caen Normandie
2014-2024
École Nationale Supérieure d'Ingénieurs de Caen
2014-2024
Normandie Université
2016-2024
Centre National de la Recherche Scientifique
2014-2024
Laboratoire de Physique Corpusculaire de Caen
2014
Institut Lavoisier de Versailles
2011
Université de Versailles Saint-Quentin-en-Yvelines
2006-2010
Institut Charles Gerhardt Montpellier
2009-2010
École Nationale Supérieure de Chimie de Montpellier
2009-2010
The coordinatively unsaturated sites in MIL-101, Cr3(F,OH)(H2O)2O[(O2C)-C6H4-(CO2)]3⋅n H2O (n≈25), having zeotypic giant pores can be selectively functionalized a way differing from that of mesoporous silica. Metal–organic frameworks, grafted with ethylenediamine or diethylenetriamine on the CrIII exhibit remarkably high activities Knoevenagel condensation relative to mesophase. Supporting information for this article is available WWW under...
Mesoporous MOFs MIL-100 and MIL-101 adsorb huge amounts of CO2 CH4. Characterization was performed using both manometry gravimetry in different laboratories for isotherms coupled with microcalorimetry FTIR to specify the gas—solid interactions. In particular, uptake carbon dioxide has been shown occur a record capacity 40 mmol g−1 or 390 cm3STP cm−3 at 5 MPa 303 K.
The catalytic activity of the zirconium terephthalate UiO-66(Zr) can be drastically increased by using a modulation approach. combined use trifluoroacetic acid and HCl during synthesis results in highly crystalline material, with partial substitution terephthalates trifluoroacetate. Thermal activation material leads not only to dehydroxylation hexanuclear Zr cluster but also post-synthetic removal trifluoroacetate groups, resulting more open framework large number sites. Consequently, is...
Gas grabber: Reduction of the porous metal–organic framework MIL-100(Fe) (see picture; X−: OH− or F−; red: O trimesate ligands) to form coordinatively unsaturated sites at iron(II) (depicted as a violet circle) is essential for selective gas purification removal impurities. Detailed facts importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited typeset. They made available submitted by authors. Please note: The publisher...
The unusual adsorption behavior of CO2 in a nanoporous hybrid metal– organic solid is discussed (see figure). results indicate that the gas adsorption–desorption step related to breathing phenomenon. This study also suggests main interactions responsible for phenomenon are strong guest–framework CO2–OH as well CO2–CO2 along tunnels present structure. Supporting information this article available on WWW under http://www.wiley-vch.de/contents/jc_2089/2007/c2645_s.pdf or from author. Please...
The synthesis on the gram scale and characterization of a series flexible functionalized iron terephthalate MIL-53(Fe) type solids are reported. Chemical groups various polarities, hydrophilicities, acidities (-Cl, -Br, -CF(3), -CH(3), -NH(2), -OH, -CO(2)H) were introduced through aromatic linker, to systematically modify pore surface. X-ray powder diffraction (XRPD), molecular simulations, thermogravimetric analyses, in situ IR (57)Fe Mössbauer spectrometries indicate some similarities with...
Brolly good MOFs: A new series of hydrophobic isoreticular porous Zr oxide dicarboxylate MOFs have been prepared (see picture, blue polyhedra, O red, C black). They a one-dimensional pore system, rare combination Lewis acidity and character, higher hydrothermal mechanical stability than their UiO MOF polymorph counterparts.
A series of organically modified iron(III) terephthalate MIL-88B and 4,4′-biphenyl dicarboxylate MIL-88D flexible solids have been synthesized characterized through a combination X-ray diffraction, IR spectroscopy, thermal analysis (MIL stands for Material from Institut Lavoisier). The swelling amplitude the highly MOFs tuned by introducing functional groups onto phenyl rings shows clear dependence on steric hindrance number per aromatic ring. For instance, while introduction four methyl...
After controlled pretreatment, some Zr-terephthalate metal-organic frameworks are highly selective catalysts for the cross-aldol condensation between benzaldehyde and heptanal. The proximity of Lewis acid base sites in amino-functionalized UiO-66(NH(2)) material further raises reaction yields.
The present study attempts to understand the use of flexible porous chromium terephthalate Cr(OH)(O2C−C6H4−CO2) denoted MIL-53(Cr) (MIL = Material from Institut Lavoisier) for separation mixtures CO2 and CH4 at ambient temperature. coadsorption was studied by a variety different techniques. In situ synchrotron X-ray Powder Diffraction allowed breathing solid upon adsorption gas simultaneously measured Raman spectra yielded an estimation adsorbed quantities CH4, as well quantification...
A study of the zeotypic giant pores chromium(III) tricarboxylate Cr(III)3OF(x)(OH)(1-x)(H2O)2 x {C6H3-(CO2)3}2 nH2O (MIL-100) has been performed. First, its thermal behavior, studied by X-ray thermodiffractometry and infrared spectroscopy, indicates that departure water occurs without any pore contraction no loss in crystallinity, which confirms robustness framework. In a second step, IR spectroscopy shown presence three distinct types hydroxy groups depending on outgassing conditions;...
Hierarchically porous metal–organic frameworks with mesoporous cages are demonstrated to behave as promising water adsorbents in energy-efficient dehumidification. Their low temperature desorption properties for huge sorption uptakes essential various applications including desiccant dehumidification and fresh production. Detailed facts of importance specialist readers published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...
The gallium terephthalate Ga(OH)[O2C-C6H4-CO2]·xA (A = HO2C–C6H4–CO2H) was hydrothermally synthesized in water under mild conditions (210 °C, 3½ h) the presence of terephthalic acid. compound characterized by powder X-ray diffraction, TGA, IR and BET method. This is isostructural to MIL-53 type, previously observed with trivalent cations Cr, Fe, Al, In. It exhibits a three-dimensional metal–organic framework built up from infinite chains trans corner-sharing GaO4(OH)2 octahedra...
Adsorption and release of the biologically active nitric oxide (NO) was evaluated over a series highly flexible iron(III) dicarboxylate MOFs MIL-88 structure type, bearing fumaric or terephthalic spacer functionalized not by polar groups (NO2, 2OH). As evidenced ex situ X-ray powder diffraction in IR spectroscopy, it appears that if contracted dried forms do expand their structures presence NO, combination very narrow pores trimers iron polyhedra leads to adsorption significant amounts NO...
Two porous iron trimesates, namely, commercial Basolite F300 (Fe(BTC); BTC = 1,3,5-benzenetricarboxylate) with unknown structure and synthetic MIL-100(Fe) (MIL stands for Material of Institut Lavoisier) well-defined crystalline structure, have been compared as heterogeneous catalysts four different reactions. It was found that while catalytic processes requiring strong Lewis acid sites, Fe(BTC) performs better, is the preferred catalyst oxidation These results rationalized by a combined in...
UiO-66(Zr) functionalized with carboxylic acid or anhydride groups.
Abstract Herein, a robust microporous aluminum tetracarboxylate framework, MIL‐120(Al)‐AP, (MIL, AP: Institute Lavoisier and Ambient Pressure synthesis, respectively) is reported, which exhibits high CO 2 uptake (1.9 mmol g −1 at 0.1 bar, 298 K). In situ Synchrotron X‐ray diffraction measurements together with Monte Carlo simulations reveal that this structure offers favorable capture configuration the pores being decorated density of µ ‐OH groups accessible aromatic rings. Meanwhile, based...
IR spectroscopy of probe molecules (pyridine, 2,6-dimethylpyridine, and CO) as well high-resolution solid state NMR especially double-resonance experiments give a new insight into the acidic sites amorphous silica alumina (ASA). ASA samples are heterogeneous compounds that contain mixed phase aluminum clusters pure zones. The distribution various forms depends both on preparation method Si/Al ratio. Formation leads to creation hydroxyl groups strength, up present in dealuminated HY zeolite....
Die koordinativ ungesättigten Positionen in MIL-101, Cr3(F,OH)(H2O)2O[(O2C)-C6H4-(CO2)]3⋅n H2O (n≈25), mit zeotypen Riesenporen können auf anderem Weg als mesoporöse Kieselgele selektiv funktionalisiert werden. Metall-organische Gerüste Ethylendiamin oder Diethylentriamin an den CrIII-Positionen von MIL-101 sind im Vergleich zur Mesophase bemerkenswert aktiv bei der Knoevenagel-Kondensation.
A variety of spectroscopic techniques combined with in situ pressure-controlled X-ray diffraction and molecular simulations have been utilized to characterize the five-step phase transition observed upon N2 adsorption within high-surface area metal−organic framework Co(BDP) (BDP2− = 1,4-benzenedipyrozolate). The computationally assisted structure determinations reveal structural changes involving orientation benzene rings relative pyrazolate rings, dihedral angles for bound at metal centers,...
The present study illustrates the importance of oxidation state iron within mesoporous trimesate [{Fe(3)O(H(2)O)(2)F(0.81)(OH)(0.19)}{C(6)H(3)(CO(2))(3)}(2)] denoted MIL-100(Fe) (MIL= Material from Institut Lavoisier) during adsorption molecules that can interact with accessible metal sites through π-back donation. Adsorption CO has been first followed by FTIR spectroscopy to quantify Lewis acid in dehydrated Fe(III) sample, outgassed at 150 °C, and on partially reduced Fe(II/III), 250 °C....
Abstract In addition to its high thermal stability, repetitive hydration/dehydration tests have revealed that the porous zirconium terephthalate UiO‐66 switches reversibly between dehydroxylated and hydroxylated versions. The structure of form has thus been elucidated by coupling molecular simulations X‐ray powder diffraction data. Infrared measurements shown relatively weak acid sites are available while microcalorimetry combined with Monte Carlo emphasize moderate interactions surface a...