A5038796926- Molecular Sensors and Ion Detection
- Analytical Chemistry and Chromatography
- Ultrasound and Cavitation Phenomena
- Pesticide Residue Analysis and Safety
- Porphyrin and Phthalocyanine Chemistry
- Innovative Microfluidic and Catalytic Techniques Innovation
- Natural Fiber Reinforced Composites
- Analytical Chemistry and Sensors
- Catalytic Processes in Materials Science
- Synthesis and Reactivity of Heterocycles
- Analytical chemistry methods development
- Electrochemical Analysis and Applications
- Supramolecular Chemistry and Complexes
- Catalysts for Methane Reforming
- Electrochemical sensors and biosensors
- Layered Double Hydroxides Synthesis and Applications
- Water Quality Monitoring and Analysis
- Pesticide and Herbicide Environmental Studies
- Various Chemistry Research Topics
- Supramolecular Self-Assembly in Materials
- Advanced Cellulose Research Studies
- Agriculture and Rural Development Research
- Polyamine Metabolism and Applications
- Advanced Polymer Synthesis and Characterization
- Food composition and properties
Université du littoral côte d'opale
2016-2025
Laboratoire de Synthèse Organique
2004-2023
Centre National de la Recherche Scientifique
1990-2023
Lebanese University
2023
Cheikh Anta Diop University
2015-2023
Université Alioune Diop de Bambey
2023
Université de Thiès
2023
Université Grenoble Alpes
2023
United Nations
2016
Université de Lille
2000-2015
In this article, we report the formation of micelles from a tetrathiafulvalene (TTF) end-functionalized poly(N-isopropylacrylamide) (poly(NIPAM)) derivative (1). We have determined critical aggregation concentration (CAC) and average diameter using fluorescence spectroscopy dynamic light scattering experiments, respectively. exploited NIPAM backbone polymer to thermally transform swollen hydrophilic poly(NIPAM) more globular hydrophobic state at lower solution temperature (LCST). Finally,...
Abstract A new class of polymeric thermometers with a memory function is reported that based on the supramolecular host–guest interactions poly( N ‐isopropylacrylamide) (PNIPAM) side‐chain naphthalene guest moieties and tetracationic macrocycle cyclobis(paraquat‐p‐phenylene) (CBPQT 4+ ) as host. This thermometer exhibits for thermal history solution, which arises from large hysteresis thermoresponsive LCST phase transition (LCST=lower critical solution temperature). formation metastable...
The carbonation action in concrete, which reactions transform calcium hydroxide into carbonate, is considered as a multi-phase physico-chemical process. Generally, the cementitious composites has negative effects on protection of reinforced bars due to accelerated corrosion problem. investigation degree is, therefore, necessary evaluate influence composites. In present paper, experimental techniques measure concrete are reviewed, including both qualitative and quantitative methods. It should...
This work reports on the ultrasonic synthesis of layered double hydroxides (LDH), also known as hydrotalcite-type materials. We have studied influence irradiation parameters (power, time, temperature) physicochemical properties Ni2Mg4Al1.8La0.2 precursors and related mixed oxides (MO). The low-frequency acoustic cavitation (22 kHz) was applied during precipitation aging steps co-precipitation results were compared to classical preparation route. materials characterized by ATR-FTIR, XRD, N2...
The ability to elucidate the structure of organic compounds from their nuclear magnetic resonance (NMR), infrared (IR), and mass spectrometry (MS) spectra is an essential skill, particularly for those engaged in fields synthetic analytical chemistry. Spectral analysis constitutes a fundamental component curriculum all chemistry students, as it requires development critical thinking skills. To engage motivate students structure's elucidation course, gamified learning activity was designed...
This paper presents the synthesis, structural determination and sensing capabilities toward Volatile Organic Compounds (VOCs) of a new class fluorescent indolizine-cyclodextrin sensors. Two different pathways, both involving bipyridinium ylides 6-amino-b-cyclodextrin, have been used to carry out synthesis these The macrocycle structures were dominantly established by 1H-NMR spectra systematically studied molecular modelling (MM3, AM1, AM1-COSMO methods). sensors evaluated emission...
Abstract A new class of polymeric thermometers with a memory function is reported that based on the supramolecular host–guest interactions poly( N ‐isopropylacrylamide) (PNIPAM) side‐chain naphthalene guest moieties and tetracationic macrocycle cyclobis(paraquat‐p‐phenylene) (CBPQT 4+ ) as host. This thermometer exhibits for thermal history solution, which arises from large hysteresis thermoresponsive LCST phase transition (LCST=lower critical solution temperature). formation metastable...
In the present work, an innovative range of foams, based on flax gum-filled epoxy resin was developed, reinforced or not by fibers. Foams and composites with different gum contents were produced characterized for mechanical thermal performances. To enhance organic filler's cross-linking, we exploited oxidized components' reactivity amine hardener (isophorone diamine). We compared materials obtained those derived from native components. Flax fibers primarily chemical...
The aqueous solution properties of amphiphilic tetrathiafulvalene (TTF) end-functionalized poly(N-isopropylacrylamide) (PNIPAM) derivative 1 have been studied. Fluorescence spectroscopy, dynamic light scattering (DLS) and differential scanning calorimetry (Nano-DSC) were used to monitor the temperature-induced micellization showed that underwent two successive phase transitions corresponding unimer-to-micelle lower critical temperature (LCST) transitions, respectively. We investigated...
A well-defined cyclobis(paraquat-p-phenylene) (CBPQT4+) end-functionalized poly(n-butyl acrylate) 3 was prepared via RAFT polymerization using a new trithiocarbonate CBPQT4+ derivative 2 as reversible chain transfer agent. We have shown that the electron-poor moiety at α-chain-end could be specifically modified by complex formation with various functionalized macromolecules featuring complementary electron rich end groups, thereby leading to corresponding supramolecular diblock copolymers....
<p>The fenvalerate pyrethroid insecticide was determined in various types of natural waters Senegal by means a newly-developed, simple, rapid and very sensitive photochemically-induced fluorescence (PIF) method. The PIF method optimized with respect to the irradiation time, solvent pH. obtained calibration curves yielded correlation coefficients close unity. limit detection (LOD) quantification (LOQ) values were low (LOD = 0.01–0.66 ng/ml LOQ 0.04–2.20 ng/ml, according solvent),...
We discussed about the influence of extraction mode on flaxseed gums composition and their thermal stabilities. In order to do so, gum was extracted by both classical magnetic stirring method ultrasonic-assisted (UAE). As a function time, protein content, yield, pH values were evaluated samples characterized