A5090556118- Metal-Organic Frameworks: Synthesis and Applications
- Inorganic Fluorides and Related Compounds
- Covalent Organic Framework Applications
- Zeolite Catalysis and Synthesis
- Industrial Gas Emission Control
- Chemical Synthesis and Characterization
- X-ray Diffraction in Crystallography
- Mycobacterium research and diagnosis
- Microbial Community Ecology and Physiology
- Vibrio bacteria research studies
- Pharmacological Effects of Natural Compounds
- Clostridium difficile and Clostridium perfringens research
- Nosocomial Infections in ICU
- Magnetism in coordination complexes
- Microbial infections and disease research
- Bacteriophages and microbial interactions
- Infections and bacterial resistance
- Antibiotic Resistance in Bacteria
- Genomics and Phylogenetic Studies
- Magnesium Oxide Properties and Applications
- Crystallography and molecular interactions
- Antibiotic Use and Resistance
- Water Treatment and Disinfection
- Layered Double Hydroxides Synthesis and Applications
- Infectious Diseases and Mycology
Centre National de la Recherche Scientifique
2006-2014
Laboratoire Catalyse et Spectrochimie
2006-2014
École Nationale Supérieure d'Ingénieurs de Caen
2008-2014
Université de Caen Normandie
2009-2012
Le Mans Université
2008
Conditions Extrêmes et Matériaux Haute Température et Irradiation
2008
Institut de Chimie de la Matière Condensée de Bordeaux
2008
Institute of Physics
2008
Université de Versailles Saint-Quentin-en-Yvelines
2006
Centre Hospitalier Universitaire de Lille
1978
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 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....
The adsorption of the acid gas H2S has been explored in both MIL-47(V) and MIL-53(Cr) porous metal−organic frameworks (MOFs) by combining infrared measurements molecular simulations. It is shown that while structure remains rigid upon up to a pressure 1.8 MPa, solid initially present large pore form (LP) switches its narrow version (NP) at very low before undergoing second structural transition from NP LP versions higher pressure. Such transitions further explain different shape isotherms...
Infrared spectra of MIL-100(Al) have been recorded after evacuation from room temperature up to 623 K. In addition adsorbed water molecules characterized by specific (ν+δ)H2O combination bands at about 5300 cm–1, analysis shows the presence impurities like carboxylic acid and nitrates resulting synthesis step, explaining low amount Al–OH groups detected. The Lewis acidity has CO [ν(CO) 2183 cm–1], pyridine [ν8a band estimated 1618 CD3CN [ν(CN) 2326 cm–1] adsorption on activated sample. is...
The adsorption of CO2 by a series functionalized flexible MIL-53(Fe) solids has been evaluated through combination in situ X-ray power diffraction, calorimetry, IR spectroscopy and computer modelling. It appears that (i) strongly polar groups maintain the nonporous structure its closed form due to strong intra-framework interactions (ii) less functional allow only modulation CO2–framework interactions, some cases with disappearance initial μ2-OH⋯X hydrogen bonds, but do not interact directly...
An alternative activation method was developed to stabilize the Metal Organic Framework (MOF) MIL-47(V) material in VIII oxidation state. This solid and oxidized forms were investigated by situ infrared Raman spectroscopies, X-ray diffraction (XRD), Complex Impedance Spectroscopy (CIS). Unlike MIL-47(VIV), MIL-47(VIII) is a flexible structure which presents μ2-hydroxyl groups acting as preferential adsorption sites for H2O or CO2. The modulation of state metal center this porous leads new...
The room temperature sorption properties of the biological gas nitric oxide (NO) have been investigated on highly porous and rigid iron or chromium carboxylate based metal-organic frameworks Material Institut Lavoisier (MIL)-100(Fe Cr) MIL-127(Fe). In all cases, a significant amount NO is chemisorbed at 298 K with loading capacity that depends both nature metal cation, structure presence additional iron(II) Lewis acid sites. second step, release triggered by wet nitrogen has studied...
This paper reports a new way of modulating the strength Brønsted acid sites porous solid. Our approach consists grafting various polar molecules (H2O, CD3OH, CF3CH2OH, and (CF3)2CHOH) on MIL-100(Cr), mesoporous crystallized chromium carboxylate with accessible unsaturated metal sites. We demonstrate, using infrared spectroscopy, that all these compounds do coordinate coordinatively Cr3+ generates controlled whose strength, measured by CO adsorption at 100 K, depends nature adsorbate. It can...
Gespür für Gase: Durch Reduktion des porösen Metall-organischen Gerüsts MIL-100(Fe) (siehe Bild; X−: OH− oder F−; rot: O von Trimesat-Liganden) entstehen koordinativ ungesättigte Eisen(II)-Zentren (angedeutet durch den violetten Kreis), die entscheidender Bedeutung Gasreinigung das selektive Entfernen ungesättigter Verunreinigungen aus Gasen sind.
High surface area aluminium hydroxyfluoride exhibiting the pyrochlore-type structure has been synthesized using microwave hydrothermal process. The optimization of crystallite size and material performed by varying some synthesis parameters, i.e. nature precursor, choice solvents addition a small amount ether. as-prepared solid contains nanosized particles as calculated XRD (average particle size: 12 nm) leading to around 140 m2 g−1. These results have confirmed TEM observations. framework...
Carbon dioxide and methane adsorption has been carried out up to 50 bar on the MIL-47(V) metal–organic framework (MOF) at 303 K. The so-obtained performance compared with other well-known MOFs, an activated carbon, zeolite NaY both in amount volume adsorbed scales. In latter scale, which would be of interest for real applications, shows promising results similar those Cu3(BTC)2 or HKUST-1. Operando Infrared experiments have employed characterize strength interactions play. Finally, CO2/CH4...
Aluminum fluoride hydrate was synthesized by a microwave hydrothermal process. The structure derives from the ReO3 type structure, that is, high temperature of α-AlF3. cubic symmetry adopted this compound arises water molecules, stabilized as ligand surrounding Al3+ cations which induces cationic vacancies revealed Rietveld refinement. following chemical formula Al0.82◻0.18F2.46(H2O)0.54 is supported analysis and TGA measurements. This represents first example aluminum vacancy in Al-based...
The direct F2 gas fluorination of a mesoporous silica gel has been shown to be unique method leading very high levels (up 13 wt % F in the bulk). final powders are homogeneous with controlled amount grafted fluorine. In this study, various conditions were tested, such as duration, temperature, concentration fluorinating gas, or an annealing pretreatment. content fluorine on was quantified by XPS and Seel method. Infrared spectroscopy measurements accounted for consumption different types...
The combination of several probe molecules has enabled the construction a detailed picture surface aluminium hydroxyl fluoride, AlF2.6(OH)0.4, which hexagonal tungsten bronze (HTB) structure. Using pyridine as leads to features at 1628 cm−1, ascribed very strong Lewis acid sites, and 1620–1623 is result different types sites. This heterogeneity indicated also from CO adsorption 100 K; presence five site deduced suggested arise hydroxylated environment. Brønsted sites medium strength are by...
The effect of H2S upon the acidity MgO surface has been investigated using FTIR spectra adsorbed dimethylpyridine (2,6-DMP) and CO as test molecules. In presence weakly bound H2S, 2,6-DMP reveal Brønsted acidity. Adsorption perturbs OH groups from only in or aprotic molecules such CO2 SO2. This infers that these are activated by acidic which act source protons. Thus, weak adsorption compounds, SO2, CO2, can lead to dramatic enhancement surface.
Die steuerbare Reduzierbarkeit koordinativ ungesättigter Eisenzentren in MIL-100(Fe), [Fe3O(H2O)2F0.81(OH)0.19{C6H3(CO2)3}2]⋅14.5 H2O, wird von J.-S. Chang et al. der Zuschrift auf S. 6085 ff. beschrieben. Durch thermische Aktivierung MIL-100(Fe) entstehen ungesättigte Zentren mit gemischtvalentem FeII/FeIII, was zu einer Sorptionsselektivität für Gasmoleküle wie Propylen führt.
A numerical analysis based on 161 phenotypic characteristics was performed with 58 strains of fluorescent pseudomonads isolated from 3 Lebanese spring waters, and 49 type or collection belonging related to genus Pseudomonas. The data were analysed using the Dice similarity coefficient (SD) unweighted pair group algorithm arithmetic averages. Eleven clusters (I XI) defined at 72% level. Clusters I, III V, VIII further divided into 14 subclusters. Three subclusters: Vb (eight strains), Vd...
Polluted river water was studied in an experimental lagoon to determine efficiency of removal bacteriophages injected at the inlet lagoon. The were not significantly affected by purification process and found migrate outlet 4 5 days. They detected 143 days after injection although about 80% added virus removed treatment. These results contrast with those obtained Salmonella, 99.9% which removed.