A5035480645- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Polyoxometalates: Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Zeolite Catalysis and Synthesis
- Chemical Synthesis and Characterization
- Advanced NMR Techniques and Applications
- Mesoporous Materials and Catalysis
- Nanocluster Synthesis and Applications
- Chemical Synthesis and Reactions
- Advanced Nanomaterials in Catalysis
- Inorganic Chemistry and Materials
- Vanadium and Halogenation Chemistry
- Crystallography and molecular interactions
- Magnetism in coordination complexes
- NMR spectroscopy and applications
- Clay minerals and soil interactions
- Covalent Organic Framework Applications
- Metal complexes synthesis and properties
- Inorganic Fluorides and Related Compounds
- biodegradable polymer synthesis and properties
- Catalysis and Hydrodesulfurization Studies
- Supramolecular Chemistry and Complexes
- Metalloenzymes and iron-sulfur proteins
- Supramolecular Self-Assembly in Materials
Institut Lavoisier de Versailles
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Université de Versailles Saint-Quentin-en-Yvelines
2016-2025
Université Paris-Saclay
2017-2025
Bielefeld University
2014
Russian Academy of Sciences
2010
Université Paris Cité
2010
Laboratoire de Chimie Physique
2010
Université de Rennes
2008-2009
Institut Universitaire de France
2004-2009
A new aluminum trimesate Al12O(OH)18(H2O)3(Al2(OH)4)[btc]6.24H2O, denominated MIL-96, was synthesized under mild hydrothermal conditions (210 degrees C, 24 h) in the presence of 1,3,5-benzenetricarboxylic acid (trimesic or H3btc) water. Hexagonal crystals, allowing a single-crystal XRD analysis, are grown from mixture trimethyl 1,3,5-benzenetricarboxylate (Me3btc), HF, and TEOS. The MIL-96 structure exhibits three-dimensional (3D) framework containing isolated trinuclear mu3-oxo-bridged...
This contribution deals with the hydrothermal synthesis of metal-organic framework aluminum trimesate, analogous to MIL-100-type, previously reported chromium(III) and iron(III). MIL-100(Al) crystallizes within a very narrow pH range (0.5−0.7) after heating mixture nitrate, trimethyl 1,3,5-benzenetricarboxylate (Me3btc), nitric acid, water at 210 °C for 3.5 h. The resulting product consists tiny octahedral shaped crystals 2 μm size, which have been used atomic structure determination. It was...
The vanadium-based terephthalate analogs of MIL-68 have been obtained with gallium and indium (network composition: M(OH)(O(2)C-C(6)H(4)-CO(2)), M = Ga or In) by using a solvothermal synthesis technique N,N-dimethylformamide as solvent (10 48 h, for In, respectively, at 100 degrees C). They characterized X-ray diffraction analysis; vibrational spectroscopy; solid-state (1)H (1)H-(1)H radio-frequency-driven dipolar recoupling (RFDR), double quantum correlation (DQ), (13)C{(1)H} cross...
The Keggin-type polyoxometalate (POM) PW12O403– and the catalytic complex Cp*Rh(bpydc)Cl2 (bpydc = 2,2′-bipyridine-5,5′-dicarboxylic acid) were coimmobilized in Zr(IV) based metal organic framework UiO-67. POM is encapsulated within cavities of MOF by situ synthesis, then, Rh introduced postsynthetic linker exchange. Infrared Raman spectroscopies, 31P 13C MAS NMR, N2 adsorption isotherms, X-ray diffraction indicate structural integrity all components (POM, Rh-complex MOF) composite interest...
A porous framework titanium(IV) N,N'-piperazinebis(methylenephosphonate) (MIL-91(Ti)) and its aluminum analogue have been prepared under hydrothermal conditions (MIL = Material Institut Lavoisier). The structure of the analogue, AlOH(H2L)·nH2O (n ∼ 3, L O3P−CH2−NC4H8N−CH2−PO3) was solved from a small single crystal refined against laboratory powder X-ray diffraction data. titanium form (TiO(H2L)·nH2O 4.5)) determined using as starting model refining it Their structures are built up trans...
A new porous metal-organic framework (MOF)-type aluminum pyromellitate (MIL-121 or Al(OH)[H(2)btec]·(guest), (guest = H(2)O, H(4)btec pyromellitic acid) has been isolated by using a high-throughput synthesis method under hydrothermal conditions. Its structure was determined from powder X-ray diffraction analysis synchrotron radiation (Soleil, France) and exhibits network closely related to that of the MIL-53 series. It is three-dimensional (3D) containing one-dimensional (1D) channels...
Herein, we report on a three-component supramolecular hybrid system built from specific recognition processes involving Dawson-type polyoxometalate (POM), [P2W18O62]6–, cationic electron-rich cluster [Ta6Br12(H2O)6]2+, and γ-cyclodextrin (γ-CD). Such materials have been investigated using bottom-up approach by studying the interactions between γ-CD both types of inorganic units. Their ability to interact has in solid state single-crystal X-ray diffraction (XRD) solution multinuclear NMR...
In an attempt to understand the relationship between chemistry occurring in solution and topology of final crystalline structures, this paper investigates through ex situ 27Al 1H NMR methods, formation mechanisms three porous aluminum trimesates MIL-96, MIL-100, MIL-110, hydrothermal synthesis conditions which are very similar, despite distinct crystallographic structures. The nature starting organic reactant—trimesic acid (H3btc) or trimethyltrimesate ester (Me3btc)—is paramount importance...
The encapsulation of polyoxometalates within the large pores Zr(iv) biphenyldicarboxylate UiO-67 metal-organic framework has been achieved, for first time, by direct solvothermal synthesis. resulting POM@UiO-67 composite materials were fully characterized XRPD, IR, MAS NMR, N2 porosimetry measurements and cyclic voltammetry.
In this communication, we report on a noteworthy hybrid supramolecular assembly built from three functional components hierarchically organized through noncovalent interactions. The one-pot synthesis procedure leads to the formation of large Mo-blue ring-shaped anion {Mo154}, which contains adduct based symmetric encapsulation Dawson-type [P2W18O62]6– by two γ-cyclodextrin units. Such nanoscopic onion-like structure, noted [P2W18O62]@2γ-CD@{Mo154} has been characterized single-crystal X-ray...
Formation of one the most representative polyoxometalate (POM) archetypes, namely Lindqvist anion M6O192- with M = MoVI or WVI, was considered as elusive in aqueous solution. Herein, we report on host-guest stabilization species Mo W from solution using γ-cyclodextrin trapping agent. The adduct {M6O19@γ-CD}2- reveals remarkable hydrolytic stability that offers new opportunities for exploring potentialities molybdates tungstates field biology and medicine, when combined to CDs efficient drug...
Abstract Herein, we show how the chaotropic effect arising from reduced molybdate ions in acidified aqueous solution is able to amplify drastically weak supramolecular interactions. Time‐resolved Small Angle X‐ray Scattering (SAXS) analysis suggests that molybdenum‐blue oligomeric species form huge aggregates presence of γ‐cyclodextrin (γ‐CD) which results fast formation nanoscopic {Mo 154 }‐based host‐guest species, while diffraction reveals ending‐point scenario an unprecedented...
In aqueous solution, low-charged polyoxometalates (POMs) exhibit remarkable self-assembly properties with nonionic organic matter that have been recently used to develop groundbreaking advances in host–guest chemistry, as well soft science. Herein, we exploit the affinity between a chaotropic POM and native cyclodextrins (α-, β-, γ-CD) enhance structural functional diversity of cyclodextrin-based open frameworks. First, reveal Anderson–Evans type polyoxometalate [AlMo6O18(OH)6]3– represents...
To make a drug work better, the active substance can be incorporated into vehicle for optimal protection and control of delivery time space. For making carrier, porous metal–organic framework (MOF) offer high drug-loading capacity various designs effective performance, biocompatibility, biodegradability. Nevertheless, its degradation process is complex not easily predictable, toxicity concern related to MOF products remains challenge their clinical translation. Here, we describe an in-depth...
A new metal organic framework (MOF)-type aluminum pyromellitate or Al4(OH)8[C10O8H2]·4.8−5H2O (called MIL-120) has been hydrothermally synthesized at 210 °C for 24 h. Its structure was analyzed by single-crystal microdiffraction using the synchrotron radiation beamline ID13 station (ESRF, Grenoble). It consists of infinite chains centers in octahedral coordination connected to each other through linker. The structural feature is existence AlO2(OH)4 octahedra linked via a common edge...
Ammonia treatment of USY zeolite has led to a new hierarchical material. The local and global structural changes during the transformation have been monitored by XRD 1H, 29Si, 27Al solid-state NMR. A wealth 1D 2D NMR protocols were applied, including 1H DQ–SQ (double-quantum–single-quantum), MQMAS (multiple-quantum magic angle spinning), 29Si MAS (magic spinning) CPMAS (cross-polarization 1H–29Si HETCOR (heteronuclear correlation). effects aqueous ammonia treatment, different thermal...
Understanding the crystallization mechanisms of nanoporous solids remains one most challenging issues in materials science. This Short Review focuses on use situ nuclear magnetic resonance (NMR) spectroscopy under hydrothermal conditions to investigate structure, dynamics, and stability/reactivity soluble species present synthesis medium during crystallization. We describe how formal SBU (secondary building units) concept for solid construction can experimentally be investigated, checked,...
Hierarchical zeolites are a class of superior catalysts which couples the intrinsic zeolitic properties to enhanced accessibility and intracrystalline mass transport from active sites. The design hierarchical USY (Ultra‐Stable Y) is achieved using sustainable postsynthetic room temperature treatment with mildly alkaline NH 4 OH (0.02 m ) solutions. Starting commercial dealuminated zeolite (Si/Al = 47), material obtained by selective tuneable creation interconnected accessible small mesopores...
P2W18Co4@MOF-545, which contains the sandwich-type polyoxometalate (POM) [(PW9O34)2Co4(H2O)2]10- (P2W18Co4) immobilized in porphyrinic metal-organic framework (MOF), MOF-545, is a "three-in-one" (porosity + light capture catalysis) heterogeneous photosystem for oxygen-evolution reaction (OER). Thin films of this composite were synthesized on transparent and conductive indium tin oxide (ITO) supports using electrophoretic (EP) or drop-casting (DC) methods, thus providing easy-to-use devices....
We describe solid-gas phase, single-crystal-to-single-crystal, postsynthetic modifications of a metal-organic framework (MOF). Using ozone, we quantitatively transformed the olefin groups UiO-66-type MOF into 1,2,4-trioxolane rings, which then selectively converted either aldehydes or carboxylic acids.