A5062885127- Luminescence and Fluorescent Materials
- Lanthanide and Transition Metal Complexes
- Radical Photochemical Reactions
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Catalytic Alkyne Reactions
- Photochromic and Fluorescence Chemistry
- Photochemistry and Electron Transfer Studies
- Synthesis and Properties of Aromatic Compounds
- Supramolecular Chemistry and Complexes
- Cyclopropane Reaction Mechanisms
- Magnetism in coordination complexes
- Molecular Sensors and Ion Detection
- Fluorine in Organic Chemistry
- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Click Chemistry and Applications
- Nanoplatforms for cancer theranostics
- Catalytic Cross-Coupling Reactions
- Radiopharmaceutical Chemistry and Applications
- Polydiacetylene-based materials and applications
- Metal complexes synthesis and properties
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced MRI Techniques and Applications
Centre National de la Recherche Scientifique
2014-2024
Institut des Sciences Moléculaires
2022-2024
Université de Bordeaux
2013-2024
Laboratoire de Chimie
2014-2024
Université Claude Bernard Lyon 1
2014-2024
École Normale Supérieure de Lyon
2014-2024
Institut Polytechnique de Bordeaux
2024
Laboratoire Ondes et Matière d'Aquitaine
2023
École Nationale Supérieure de Chimie de Rennes
2019-2021
Université de Rennes
2019-2021
Fluorescent probes that are able to directly measure viscosity attractive candidates for the study of intracellular environments. We report a new class luminescent rotors, based on sensitized emission terbium(III) complex. A 4-fold increase in both quantum yield and luminescence lifetime was observed viscous media studied complexes, with ranging from 0.23 0.89 ms over broad range viscosities (0.6-1200 cP). The presented approach, relying millisecond-scale lanthanide ions, applied fixed T24...
Abstract It is commonly accepted that a full bandgap voltage required to achieving efficient electroluminescence (EL) in organic light-emitting diodes. In this work, we demonstrated molecules with large singlet-triplet splitting can achieve EL at voltages below the voltage. The originates from delayed fluorescence due triplet fusion. Finally, spite of lower quantum efficiency, blue fluorescent diode having power efficiency higher than some best thermally activated and phosphorescent diodes...
Abstract Organic donor–acceptor–donor (D–A–D) polymers or small molecules are widely investigated in organic solar cells due to their broad light absorption, narrow band gap, excellent charge mobility, and exciton seperation at the interface. However, studies of conjugated with D–A–D molecule structures as photocatalytically active materials still rare. In this study, an unprecedented demonstration that photocatalytic activity can fact be affected by tuning D A is given. Especially, EBE...
An Yb(<sc>iii</sc>) complex based on a dimethyl cyclen macrocyclic ligand is used as two-photon NIR bioprobe.
A computationally inspired Cu(I) metal-to-ligand charge transfer (MLCT) chromophore, [Cu(sbmpep)2]+ (sbmpep = 2,9-di(sec-butyl)-3,8-dimethyl-4,7-di(phenylethynyl)-1,10-phenanthroline), was synthesized in seven total steps, prepared from either dichloro- or dibromophenanthroline precursors. Complete synthesis, structural characterization, and electrochemistry, addition to static dynamic photophysical properties of [Cu(sbmpep)2]+, are reported on all relevant time scales. UV–Vis absorption...
Two 1,1,4,4-tetracyanobutadiene (TCBD) derivatives were prepared by [2+2]cycloaddition-retroelectrocyclization from ynamides bearing either a pyrene (1) or perylene unit (2). In addition to panchromatic absorptions in 2, the solid state, both compounds unexpectedly display NIR photoluminescence that could be detected up about 1350 nm.
Abstract An original samarium(III) complex based on a triazacyclononane platform functionalized with charge‐transfer antenna chromophore exhibited optimized brightness and was successfully used as an emissive species for two‐photon microscopy experiments in both the visible near‐infrared spectral ranges.
An original cationic water-soluble cyclen-based Eu(III) complex [EuL1]+ featuring a chromophore-functionalized antenna to increase the two-photon (2P) absorption properties was synthesized. The photophysical were thoroughly studied in various solvents and rationalized with help of theoretical calculations. exhibits an optimized 2P cross section. Finally, microscopy imaging experiments on living T24 human cancer cells highlighted spontaneous internalization biological stability this bioprobe...
Two small 1,1,4,4-tetracyanobutadiene-functionalized chromophores were obtained by careful leverage of the regioselectivity cycloaddition reaction tetracyanoethylene with anthracene–ynamide derivatives, inducing either a [2 + 2] or [4 Diels–Alder process. DFT calculations unraveled mechanism cycloaddition–retroelectrocyclization sequence ynamides and elucidated differing mechanisms in two substrates. The synthesized dyes presented panchromatic absorption extending into near-IR...
Chiral, enantiopure Yb(III) complexes exhibit circularly polarized luminescence (CPL) in the near infrared (NIR) wavelength region. This CPL is quantified by dissymmetry factor (
An amorphous boron carbide ceramic is prepared via hot wall chemical vapor deposition at 1000 °C using a BCl3/CH4/H2 mixture. Its elemental composition assessed by electron probe microanalysis (EPMA) and its structure studied Raman spectroscopy, transmission microscopy (TEM), both X-ray diffraction (XRD) neutron diffraction, 11B magic angle spinning nuclear magnetic resonance (MAS NMR), absorption spectroscopy (XAS), ab initio modeling. The atomic factor pair distribution function derived...
Abstract The design of original twisted charge transfer antennae in which a non‐planar geometry is enforced thanks to one or two bulky ortho ‐Me substituents allows us prepare the corresponding ultra‐bright Tb III and Dy bioprobes. brightness derivative compares well with that benchmark Tb‐Lumi4 complex. first bio‐imaging experiments luminescent bioprobe are also reported.
During the course of our research studies aiming to combine unique photophysical properties lanthanide complexes and intrinsic advantage a nonlinear two-photon excitation, we described proof-of-concept biphotonic multiplexing bio-imaging experiment. To that end, new Tb-luminescent bioprobe [TbL(2)] was designed using TACN-trispicolinate platform. The imaging T24 fixed cells stained either with or already [EuL(1)] is reported. Finally experiment performed combination both probes spectral mode...
1,1,4,4-Tetracyanobutadienes (TCBDs) bearing a large diversity of fluorophores were prepared following multi-step synthesis. In crucial last step, all compounds obtained from the corresponding ynamides, which particularly suitable for formation TCBDs in presence tetracyanoethylene via [2+2] cycloaddition/retroelectrocyclization step (CA-RE). Several fluorenyl derivatives addition to phenanthrenyl and terphenyl ones provided ynamide-based affording remarkable emission properties covering...
Cationic lanthanide complexes are generally able to spontaneously internalize into living cells. Following our previous works based on a diMe-cyclen framework, second generation of cationic water-soluble constrained cross-bridged cyclam macrocycle functionalized with donor-π-conjugated picolinate antennas was prepared europium(III) and ytterbium(III). Their spectroscopic properties were thoroughly investigated in various solvents rationalized the help DFT calculations. A significant...
Photochemical upconversion (UC) through triplet–triplet annihilation (TTA), which employs a visible absorbing triplet photosensitizer and an annihilator, is process that generates high energy photon from two lower photons. TTA-UC has been largely developed in pure organic solvents solid-state polymeric constructs while featuring near exclusive use of rare expensive metals within the photosensitizer. In this current investigation, we demonstrate long lifetime earth-abundant [Cu(dsbtmp)2](PF)6...
In recent years, nonconjugated organic luminophores are receiving considerable interest from the scientific community, offering a new conceptual basis for development of alternative photoluminescence-based technologies. this work, polymerization 3,4-dihydropyran was exploited preparation photoluminescent polymer nanoparticles. Remarkably, excitation-dependent multicolor emission ranging blue to yellow observed in both solid and solution. contrast with similar materials, behavior not...
<p>Cationic lanthanide complexes are generally able to spontaneously internalize into living cells. Following our previous works based on diMe-cyclen framework, a second generation of cationic water-soluble constrained cross-bridged cyclam macrocycle functionalized with donor-p-conjugated picolinate antennas has been prepared europium(III) and ytterbium(III). Their spectroscopic properties were thoroughly investigated in various solvents rationalized the help DFT calculations. A...
An aromatic oligoamide sequence integrating multiple anthracene motifs forms a supramolecular helix-on-axle architecture exhibiting photodriven guest expulsion with thermal reversibility.
Chiral, enantiopure Yb(III) complexes are able to emit circularly polarized luminescence (CPL) in the near infrared (NIR) wavelength region, quantified by dissymmetry factor (glum). Due crystal field splitting (CFS), excited state 2F5/2 consists of three mj' sublevels, which populated accordance with Boltzmann distribution. Consequently, room temperature CPL spectra sum various - either positive or negative – contributions, that practically impossible quantify. Thanks use an advanced setup...
Polymerization reactions initiated by ultraviolet light are ubiquitous in scores of industrial applications but would markedly benefit from visible activation to overcome stability, energy consumption, and sample geometry limitations. The current work leverages visible-light driven homomolecular triplet-triplet annihilation (TTA) zinc(II) meso-tetraphenylporphyrin (ZnTPP) initiate facile free-radical polymerization trimethylolpropane triacrylate (TMPTA) monomers through ultrafast electron...
Cationic lanthanide complexes are generally able to spontaneously internalize into living cells. Following our previous works based on diMe-cyclen framework, a second generation of cationic water-soluble constrained cross-bridged cyclam macrocycle functionalized with donor-p-conjugated picolinate antennas has been prepared europium(III) and ytterbium(III). Their spectroscopic properties were thoroughly investigated in various solvents rationalized the help DFT calculations. A significant...