A5036655135- Porphyrin and Phthalocyanine Chemistry
- Luminescence and Fluorescent Materials
- Advanced Photocatalysis Techniques
- Molecular Sensors and Ion Detection
- Photochemistry and Electron Transfer Studies
- CO2 Reduction Techniques and Catalysts
- Analytical Chemistry and Sensors
- Polyoxometalates: Synthesis and Applications
- Spectroscopy and Quantum Chemical Studies
- Carbon dioxide utilization in catalysis
- Molecular Junctions and Nanostructures
- Photosynthetic Processes and Mechanisms
- Photoreceptor and optogenetics research
- Metal-Organic Frameworks: Synthesis and Applications
- Fullerene Chemistry and Applications
- Copper-based nanomaterials and applications
- Metal complexes synthesis and properties
- Advanced Nanomaterials in Catalysis
- Nanomaterials for catalytic reactions
- Electrocatalysts for Energy Conversion
- Crystallization and Solubility Studies
- Nanocluster Synthesis and Applications
- Metal-Catalyzed Oxygenation Mechanisms
- Advanced biosensing and bioanalysis techniques
- X-ray Diffraction in Crystallography
Université Paris-Saclay
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institut des Sciences Moléculaires d'Orsay
2016-2025
Université Paris-Sud
2016-2020
Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires
2007-2019
École Normale Supérieure Paris-Saclay
2006-2019
Centre Hospitalier d'Orsay
2019
Université Paris Cité
2010-2014
Laboratoire Francis Perrin
2008-2010
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2010
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...
Abstract Graphdiyne (GDY), which features a highly π‐conjugated structure, direct bandgap, and high charge carrier mobility, presents the major requirements for photocatalysis. Up to now, all photocatalytic studies are performed without paying too much attention on GDY bandgap (1.1 eV at G 0 W many‐body theory level). Such narrow is not suitable band alignment between other semiconductors, making it difficult achieve efficient photogenerated separation. Herein, first time, demonstrated that...
Iron porphyrins are among the best molecular catalysts for electrocatalytic CO2 reduction reaction. Powering these with help of photosensitizers comes along a couple unsolved challenges that need to be addressed much vigor. We have designed an iron porphyrin catalyst decorated urea functions (UrFe) acting as multipoint hydrogen bonding scaffold towards substrate. found spectacular photocatalytic activity reaching unreported TONs and TOFs high 7270 3720 h-1 , respectively. While Fe0 redox...
The immobilization of polyoxometalates (POMs) near catalytic centers metal–organic frameworks (MOFs) has been reported as an advantageous strategy to boost their photocatalytic activity toward strategic reactions such CO2 reduction (CO2RR) or hydrogen evolution (HER), although the reasons for enhancement are still poorly understood. Unveiling role POM guests in reaction mechanisms is therefore a key step development next generation multicomponent materials with optimal performances. Here, we...
Abstract Downsizing the graphdiyne (GDY) network to shape quantum dots (QDs) will provide attractive optical and electronic properties associated with confinement edge effects. Here, it is demonstrated that defect introduction allow using GDY in donor–acceptor photocatalytic systems for solar‐to‐hydrogen conversion. The defect‐rich QDs (GDYO‐QDs) exhibit a blue‐to‐green excitation‐dependent photoluminescence behavior, demonstrating their ability harvest light over wide energy range....
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....
With a direct band gap, superior charge carrier mobility, and uniformly distributed pores, graphdiyne (GDY) has stimulated tremendous interest from the scientific community. However, its broad application is greatly limited by complicated multistep synthesis process including complex deprotection of hexakis-[(trimethylsilyl)ethynyl]benzene (HEB-TMS) peeling GDY substrates. Here, we describe deprotection-free strategy to prepare powder directly using HEB-TMS as monomer. When CuCl was used...
A new fluorescent molecular sensor for Hg2+ based on the phosphane sulfide derivative exhibits a very low detection limit in an aqueous medium (3.8 nM) with high selectivity over other interfering cations. The reversibility of complexation process was also examined and found to be successful. [structure: see text]
A unique polyoxometalate complex made up of a tetradecanuclear nickel bisphosphonate cluster capping {SiW9} unit has been characterized. This stable compound exhibits high hydrogen evolution reaction photocatalytic activity under visible light irradiation via reductive quenching mechanism.
The ultrafast dynamics of copper tetraphenylporphyrin (CuTPP), octaethylporphyrin (CuOEP), and the free base (H2TPP), excited in S2 state have been investigated gas phase by femtosecond pump/probe experiments. porphyrins were Soret band at 400 nm. Strikingly, S2-S1 internal conversion H2TPP is very rapid (110 fs), as compared to that ZnTPP (600 previously observed. In turn, CuTPP CuOEP, S2, follow an efficient different relaxation pathway from other open-shell metalloporphyrins. These two...
Biomimetic models that contain elements of photosynthesis are fundamental in the development synthetic systems can use sunlight to produce fuel. The critical task consists running several rounds light-induced charge separation, which is required accumulate enough redox equivalents at catalytic sites for target chemistry occur. Long-lived first charge-separated state and distinct electronic signatures sequential accumulated species essential features be able track these events on a...
New fluorescent molecular sensors based on a calix[4]arene biscrown-6 ether as coordination site and BODIPY derivative signaling unit were synthesized, their photophysical properties characterized. The complexation of these with potassium cesium cations investigated using both steady-state time-resolved fluorescence methods. studies show that the sensitivity depends upon position substituted core. does not have much effect absorption emission wavelength when (calix[4]arene ether) is...
Development of a portable miniature system for Al(<sc>iii</sc>) detection in pure aqueous solutions using novel AIEE compound.
Abstract The development of highly selective sensors for potassium is great interest in biology. Two new hydrosoluble (Calix‐COU‐Alkyne and Calix‐COU‐Am) based on a calix[4]arene bis(crown‐6) an extended coumarin were synthesized characterized. photophysical properties complexation studies these compounds have been investigated show high molar extinction coefficients fluorescence quantum yields. Upon with the millimolar concentration range, increase one‐ two‐photon emission detected. A...
Methylviologen (MV2+) is perhaps the most used component as a reversible electron acceptor in photophysical studies. While MV2+ commonly implicated one-electron mediator, its electrochemical properties clearly evidence two successive reduction processes. In this report, we have investigated on light driven two-charge accumulation using multicomponent system composed of prototypical molecular photosensitizer [Ru(bpy)3]2+ and presence ascorbate donor. The sequential addition electrons...
Abstract The [Re(bpy)(CO) 3 Cl] catalyst pioneered by Lehn for the two‐electron reduction of CO 2 has constantly revealed unique facets in mechanistic understanding selective transformation . A novel triazole‐linked ruthenium photosensitizer and a rhenium dyad was synthesized investigated photo‐induced charge accumulation using time‐resolved absorption spectroscopy. triazole bridging ligand promoted weak electronic communication between two units, resulting an anodic shift potentials Re...
Abstract Two BODIPY‐C 60 ‐peptide assemblies were synthesized by CuAAC reactions of dyads and a helical peptide functionalized with terminal alkyne group an azide group, respectively. The within these was at its other end disulfide allowing formation self‐assembled monolayers (SAMs) on gold surfaces. Characterizations SAMs, as well those reference molecules (BODIPY‐C ‐alkyl, C BODIPY‐peptide), carried out PM‐IRRAS cyclic voltammetry. SAMs are more densely packed than ‐alkyl BODIPY‐peptide...
The photophysical properties of a complex based on diphenylphosphanoethane (DPPE) fluorescent ligands linked to europium ion have been investigated by different spectroscopic methods. Upon complexation with europium, the interaction phosphane oxide group leads red shift absorption spectrum and strong quenching ligand emission. typical sensitized emission Eu3+ is observed upon excitation fluorescence quantum yield 1%. Time-resolved experiments performed in order investigate mechanism involved...
Abstract With a direct band gap, superior charge carrier mobility, and uniformly distributed pores, graphdiyne (GDY) has stimulated tremendous interest from the scientific community. However, its broad application is greatly limited by complicated multistep synthesis process including complex deprotection of hexakis‐[(trimethylsilyl)ethynyl]benzene (HEB‐TMS) peeling GDY substrates. Here, we describe deprotection‐free strategy to prepare powder directly using HEB‐TMS as monomer. When CuCl was...
A calixarene-based fluorescent sensor has been designed for the detection of Cs<sup>+</sup> in micromolar range.
A new donor-acceptor dyad composed of a BODIPY (4,4'-difluoro-4-bora-3a,4a-diaza-s-indacene) donor and fullerene C60 acceptor has been synthesized characterized. This derivative prepared using clickable building block that bears an alkyne moiety maleimide unit. The post-functionalization the group by thiol leads to BODIPY-C60 dyad, leaving for further functional arrangement. On basis combination semi-empirical density theory (DFT) calculations, spectroelectrochemical experiments,...
The design of a new class fluorophores is presented. Some push-pull chromophores (D-pi-A) containing polyphenylethynyl units and phosphane oxide moiety were efficiently prepared from common intermediates. Straightforward syntheses gave novel one-armed, rod-shaped three-armed, star-shaped fluorophores. optical properties the resulting derivatives evaluated, showed high fluorescence quantum yields, their excitation induces very efficient charge redistribution. Moreover, thanks to character,...
A series of fluorescent phosphane oxide derivatives based on diphenylphosphanoethane (DPPE) and diphenylphosphanomethane (DPPM) skeletons has been prepared by means Grignard reactions Sonogashira cross-couplings. The photophysical properties the linear nonlinear spectra these compounds have investigated. An edge-to-face conformation resulting in formation an excimer was confirmed fluorescence lifetime measurements multichromophoric derivatives. Upon complexation with heavy metal ions such as...
The time evolution of electronically excited heme (iron II protoporphyrin IX, [FeII PP]) and its associated salt hemin III IX chloride, [FeIII PP–Cl]), has been investigated for the first in gas phase by femtosecond pump–probe spectroscopy. porphyrins were at 400 nm S2 state (Soret band) their relaxation dynamics was probed multiphoton ionization 800 nm. This compared with that zinc [Zn PP] whose likely decays to long lived S1 through a conical intersection, less than 100 fs. Instead,...