A5036960607- Liquid Crystal Research Advancements
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Pickering emulsions and particle stabilization
- Proteins in Food Systems
- Advanced Photocatalysis Techniques
- Supercapacitor Materials and Fabrication
- Advanced Materials and Mechanics
- Lignin and Wood Chemistry
- Synthesis and Properties of Aromatic Compounds
- Mesoporous Materials and Catalysis
- Porphyrin and Phthalocyanine Chemistry
- Teleoperation and Haptic Systems
- TiO2 Photocatalysis and Solar Cells
- Virtual Reality Applications and Impacts
- Photochromic and Fluorescence Chemistry
- Polyoxometalates: Synthesis and Applications
- Plant biochemistry and biosynthesis
- Advanced Cellulose Research Studies
- Supramolecular Self-Assembly in Materials
- Lipid Membrane Structure and Behavior
- Metamaterials and Metasurfaces Applications
- Ultrasound Imaging and Elastography
- Seaweed-derived Bioactive Compounds
- Nanocluster Synthesis and Applications
Paul Pascal Research Center
2015-2025
Institut Mines-Télécom
2023-2024
IMT Atlantique
2023-2024
Center for Research in Psychopathology and Clinical Psychology
2012-2023
Université de Bordeaux
2012-2023
Centre National de la Recherche Scientifique
2012-2023
University of Boumerdes
2020
Algerian Petroleum Institute
2018-2019
University of Puerto Rico at Carolina
2014
Universidad de Granada
1994-1996
REF (Hevb1) and SRPP (Hevb3) are two major components of Hevea brasiliensis latex, well known for their allergenic properties. They obviously taking part in the biosynthesis natural rubber, but exact function is still unclear. could be involved defense/stress mechanisms after tapping or directly acting on isoprenoid biosynthetic pathway. The structure these proteins not described. In this work, it was discovered that has amyloid properties, contrary to SRPP. We investigated by CD, TEM,...
An iron(II) pyridyl-benzohydrazonate-based complex decorated with long alkyl chains is reported as a rare spin-crossover compound displaying wide thermal hysteresis spanning room temperature. On heating, this exhibits spin transition between LS ground state and an ordered HS-LS phase symmetry breaking from monoclinic P21/n into orthorhombic P21212 space groups. During cooling, the first transits magnetically distinguishable P21 before returning phase. Interconversion two distinct phases...
Block copolymer (BCP) patterning is a well-established self-assembly technique for developing surfaces with regular and controllable nanosized features. This method relies on the microphase separation of BCP film subsequent infiltration inorganic species. The serves as template, leaving behind replicas when removed. offers promising, cost-effective alternative to standard nanopatterning techniques, featuring fewer processing steps reduced energy use. However, can be complex challenging...
Combining the emulsion and cooperative templating mechanisms, self-standing macro-mesoporous SBA-15-Si(HIPE) monoliths (90–95% of porosity) have been synthesized for first time. Materials prepared from Pluronic (P123)/dodecane/water system in presence salt TEOS as silica scaffold precursor. As increasing ionic strength was shown to be ineffective toward obtaining monoliths, we induced a kosmotrope "order maker" effect within starting gel making use (NH4)2SO4 enhance polycondensation. Beyond...
Porous carbon foams were prepared by pyrolysis of a phenolic resin dual template approach using silica monoliths as hard templates and triblock copolymers soft templating agents.
The C66 (COOH)12 hexa-adduct has been successfully used as a building block to construct carboxylate bridged 3D networks with very homogeneous sub-1.8 nm ruthenium nanoparticles. obtained nanostructures are active in nitrobenzene selective hydrogenation.
The World Health Organization estimates that there were around 10 million deaths due to cancer in 2020, and lung was the most common type of cancer, with over 2.2 new cases 1.8 deaths. While have been advances diagnosis prediction is still a need for new, intelligent methods or diagnostic tools help medical professionals detect disease. Since it currently unable at an early stage, speedy detection identification are crucial because they can increase patient's chances survival. This article...
Assembling ultrahigh-molecular-weight (UHMW) block copolymers (BCPs) in rapid time scales is perceived as a grand challenge polymer science due to slow kinetics. Through surface engineering and identifying nonvolatile solvent (propylene glycol methyl ether acetate, PGMEA), we showcase the impressive ability of series lamellar poly(styrene)-block-poly(2-vinylpyridine) (PS-b-P2VP) BCPs self-assemble directly after spin-coating. In particular, show formation large-period (≈111 nm) structures...
Abstract Prolonged glyoxylation of pyrenyl‐1‐glyoxylic acid ethyl ester leads to a mixture isomers with polar pyrenylene‐1,8‐diglyoxylic as the main product, whereas centrosymmetric 1,6‐isomer is obtained in good yield from corresponding dibromopyrene. Perkin condensations followed by Pd‐catalyzed cyclizations lead isomeric dinaphthopyrene‐tetracarboxdiimides that self‐assemble into columnar liquid crystals hexagonal and rectangular symmetry, which mesophases have unusually elongated unit...
New clustomesogens (i.e., metal atom clusters containing liquid crystalline (LC) materials) have been obtained by grafting neutral cyanobiphenyl (CB)- or cholesteryl-containing tailor-made dendritic mesomorphic triphenylphosphine oxide ligands on luminescent (M6 Cl(i) 8 )(4+) octahedral cluster cores (M=Mo, W). The LC properties were studied a combination of polarizing optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray powder diffraction analyses. While the organic...
Whereas perylene tetracarboxdiimides derived from amino-n-alkanes if at all only show monotropic (thermodynamically unstable) mesogenic self-assembly, the hexagonal columnar liquid crystalline state can be stabilized over a broad temperature range with doubly branched, racemic alkyl residues. An improved tendency to homeotropic surface orientation is observed, and of domains maintained upon cycling through room temperature.
Although the double Friedel-Crafts acylation of arenes with ethyl chloroglyoxylate is hindered by strongly deactivating effect first-entering glyoxylic substituent, reaction successful reactive arene perylene under long times and concomitant ester hydrolysis. The regiospecific, giving 3,9-regioisomer exclusively. This perylenylenediglyoxylic acid condensed first o-bromophenylacetic then α-branched alkylamines to yield title compounds. Whilst corresponding tetraalkyl esters only show...
An emulsion formulation process, allowing for large scale production, yields tailored colloidal nanoresonators with electric and magnetic resonances engineered so that the resonators act as strong isotropic Huygens scatterers.
Alkylation of aromatic hydrocarbons is among the most industrially important reactions, employing acid catalysts such as AlCl3, H2SO4, HF, or H3PO4. However, these present severe drawbacks, low selectivity and high corrosiveness. Taking advantage intrinsic strength Lewis Brønsted acidity niobium oxide, we have designed first series Nb2O5-SiO2(HIPE) monolithic bearing multiscale porosity through integration a sol-gel process physical chemistry complex fluids. The MUB-105 offers efficient...
Pd and Au nanoparticle loaded carbonaceous foams have been synthesized to address the efficiency of Li–S battery electrodes for restituted cycling capacity.
Taking advantage of the benefit Pickering-based emulsions and sol–gel chemistry, we synthesized mineralized Pickering emulsion-based capsules constituted a dodecane core siliceous shell. To trigger oily mechanical release, first made use one-step polycondensation synthesis path, reaching limited shell thickness from 43 to 115 nm with resistance against application an external pressure 0.5 6 MPa. When addressing sequential mineralization route, were able reach both better homogeneity higher...
The photocyclization of tetraethyl 1,4-phenylenebis(phenylmaleate) in the presence iodine and oxygen predominantly yields [5]helicene-5,6,9,10-tetracarboxylate, together with small amounts dibenz[a,h]anthracene-5,6,12,13-tetracarboxylate benzo[ghi]perylene-3,4,11,12-tetracarboxylate. helicene tetraester is planarized to benzoperylene by Scholl reaction AlCl3 followed reesterification partially hydrolyzed crude product. Subsequent treatment a branched alkylamine columnar liquid-crystalline...
Abstract The photocatalytic properties of titanium dioxide depend not only on its electronic properties, but also the material size and shape, which can increase interactions between reactants catalyst. Most studies to date show that reducing particle down nanoscale increases efficiency, as a result higher surface volume ratio because larger proportion is actually irradiated by light. We demonstrate multiscale shape design, integrates roughness, 1D processing orientation, favor in solid–gas...