A5049143428- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Organometallic Complex Synthesis and Catalysis
- Magnetism in coordination complexes
- Metal complexes synthesis and properties
- Crystal structures of chemical compounds
- Catalytic Cross-Coupling Reactions
- Organoboron and organosilicon chemistry
- Asymmetric Hydrogenation and Catalysis
- Catalytic C–H Functionalization Methods
- Porphyrin and Phthalocyanine Chemistry
- Synthetic Organic Chemistry Methods
- Carbon dioxide utilization in catalysis
- Organic and Molecular Conductors Research
- Synthesis and characterization of novel inorganic/organometallic compounds
- Coordination Chemistry and Organometallics
- Inorganic Chemistry and Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Nonlinear Optical Materials Research
- Rare-earth and actinide compounds
- Chemical Synthesis and Analysis
- biodegradable polymer synthesis and properties
- Asymmetric Synthesis and Catalysis
- Synthesis and biological activity
Université de Rennes
2016-2025
Centre National de la Recherche Scientifique
2015-2024
Institut des Sciences Chimiques de Rennes
2015-2024
École Nationale Supérieure de Chimie de Rennes
2012-2024
Université Rennes 2
2018-2024
Institut National des Sciences Appliquées de Rennes
2005-2024
Cardiff University
2021
University College London
2021
Miniaturisation pour la Synthèse, l'Analyse et la Protéomique
2019-2020
Canadian Nautical Research Society
2017-2019
WinPLOTR is a graphic program for the analysis of powder diffraction patterns. It has been developed Windows 9x/2k/NT environment. takes advantage this graphical environment to offer powerful and user-friendly tool. The able display analyse many different kinds patterns as well calculated observed profiles coming from Windows/DOS version FullProf. can also be used Graphic User Interface (GUI) programs defined by user.
Abstract A series of new alkoxy‐amino‐bis(phenols) (H 2 L 1 – 6 ) has been synthesized by Mannich condensations substituted phenols, formaldehyde, and amino ethers or diamines. The coordination properties these dianionic ligands towards yttrium, lanthanum, neodymium have studied. resulting Group 3 metal complexes used as initiators for the ring‐opening polymerization rac ‐lactide to provide poly(lactic acid)s (PLAs). polymerizations are living, evidenced narrow polydispersities isolated...
While the development of chiral molecules displaying circularly polarized luminescence (CPL) has received considerable attention, corresponding CPL intensity, g lum, hardly exceeds 10-2 at molecular level owing to difficulty in optimizing key parameters governing such a process. To address this challenge, we report here synthesis and chiroptical properties new family π-helical push-pull systems based on carbo[6]helicene, where latter acts as either electron acceptor or donor unit. This...
Alternate tacticities: The ring-opening polymerization of rac-β-butyrolactone (rac-BBL) using a six-coordinate yttrium complex bearing dianionic amine-bis(phenolate) ligand as initiator proceeds readily at room temperature to give the corresponding poly(3-hydroxybutyrate) (PHB) with up 94 % syndiotacticity and narrow molecular-weight distributions (see scheme). Supporting information for this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z600058_s.pdf or...
The ring-opening polymerization of a mixture enantiomerically pure but different monomers using an yttrium complex as initiator proceeds readily at room temperature to give the corresponding highly alternating polyester.
A new heteroleptic ethyl-zinc complex stabilized by a chelating bis(morpholinomethyl)phenoxy ligand has been synthesised and shown to be highly potent initiator for the immortal ring-opening polymerisation (ROP) of lactide β-butyrolactone, being able convert up 50 000 equiv. monomer in presence 1000 an alcohol as transfer agent. Two related complexes magnesium calcium have also prepared. These are stable solution, even large amounts alcohol, constitute effective catalysts ROP under mild conditions.
Efficient protocols for the syntheses of well-defined, solvent-free cations large alkaline-earth (Ae) metals (Ca, Sr, Ba) and their smaller Zn Mg analogues have been designed. The reaction 2,4-di-tert-butyl-6-(morpholinomethyl)phenol ({LO(1)}H), 2-{[bis(2-methoxyethyl)amino]methyl}-4,6-di-tert-butylphenol ({LO(2)}H), 2-[(1,4,7,10-tetraoxa-13-azacyclopentadecan-13-yl)methyl]-4,6-di-tert-butylphenol ({LO(3)}H),...
Synthesis of nanoparticles under restricted environments offered by water-in-oil microemulsions provides excellent control over particle size and shape interparticle spacing. These have been used in the synthesis silica with a ZnFe2O4 magnetic core. First, aqueous fluids constituted zinc ferrite ranging between 4 6 nm synthesized using soft chemical approach. Chemical analysis has shown that are nonstoichiometric estimated formula Zn0.87Fe2.09X0.04O4 (X represents vacancies). The obtained...
A short account of the methodology used within FullProf to extract average micro-structural properties from analysis broadened lines constant wavelength diffraction patterns is presented. The approach based on Voigt approximation and can be combined with Rietveld method as well profile matching (Le Bail fit) procedure. Both instrumental sample profiles are supposed described by functions. To get reliable parameters a good knowledge Instrumental Resolution Function (IRF) needed. Only...
New alkaline-earth amido complexes catalyze the regioselective intermolecular hydroamination (see scheme; Ae=alkaline earth) and hydrophosphination of styrene isoprene with unprecedented activities. The catalytic performances increased linearly size metal.
A very simple and inexpensive catalytic system based on abundant manganese as transition metal an phosphine-free bidendate ligand, 2-(aminomethyl)pyridine, has been developed for the reduction of a large variety carbonyl derivatives with 2-propanol hydrogen donor. Remarkably, reaction proceeds at room temperature low catalyst loading (down to 0.1 mol %) exhibits good tolerance toward functional groups. High TON (2000) TOF (3600 h–1) were obtained.
On a direct course to the aldehyde: Hydrosilylation catalyzed by well-defined N-heterocyclic-carbene–iron complex under UV irradiation enabled selective reduction of esters aldehydes (see scheme; Bn=benzyl, Mes=mesityl). The low catalyst loading and very mild reaction conditions make this chemoselective transformation promising alternative with diisobutylaluminum hydride. Aldehydes are important building blocks used as reactive intermediates in organic total synthesis. Their preparation from...
The coordination chemistry of the new unsymmetrical Schiff base ligand {(3,5-tBu2-1-OC6H4)CH═N(trans-1,2-cyclo-C6H10)N═C(Me)CH2C(CF3)2O}2− ({ArONCyNOCF3}2−) onto Al(III) and Y(III) centers has been studied. Pro-ligand {ArONCyNOCF3}H2 (1) reacts with AlMe2Cl, Al(OiPr)3 Y(N(SiHMe2)2)3·(THF)2 to give corresponding complexes {ArONCyNOCF3}AlX (X = Cl, 5; OiPr, 6) {ArONCyNOCF3}Y(N(SiHMe2)2)(THF) (7) in high yields, concomitant alkane, alcohol, amine elimination, respectively. Single-crystal X-ray...
Relay to the finish: The atom-economical tandem hydrogen autotransfer catalyzed by iridium(III) has been efficiently applied for preparation of N-arylpiperidines starting from easily accessible anilines, diols, and aldehydes (see scheme). This protocol is also compatible with use diethyl carbonate as an ecofriendly solvent.
Chiral enantiomeric amino acid Schiff base copper(II) complexes 1 and 2 (a b) were synthesized characterized by various spectroscopic techniques (Fourier transform infrared, UV–vis, electron paramagnetic resonance, electrospray ionization-mass spectrometry, circular dichroism) single X-ray crystal diffraction analyses. To understand the selectivity behavior of complexes, binding interaction with ct-DNA tRNA biomolecules was investigated widely employed optical hydrodynamic techniques. The...
[{N^N}M(X)(thf)n] alkyl (X=CH(SiMe3)2) and amide (X=N(SiMe3)2) complexes of alkaline earths (M=Ca, Sr, Ba) divalent rare (Yb(II) Eu(II) ) bearing an iminoanilide ligand ({N^N}(-)) are presented. Remarkably, these proved to be kinetically stable in solution. X-ray diffraction studies allowed us establish size-structure trends. Except for one case oxidation with [{N^N}Yb(II){N(SiMe3)2}(thf)], all under the catalytic conditions constitute effective precatalysts cyclohydroamination terminal...
Abstract The first hydrosilylation of esters catalyzed by a well defined iron complex has been developed. Esters are converted to the corresponding alcohols at 100 °C, under solvent‐free conditions and visible light activation.
π-Helical push-pull dyes were prepared and their (chir)optical properties investigated both experimentally computationally. Specific fluorescent behaviour of bis-substituted system was observed with unprecedented solvent effect on the intensity circularly polarized luminescence (CPL, dissymmetry factor decreasing from 10-2 to 10-3 an increase in polarity) that linked a change symmetry chiral excited state suppression interbranched exciton coupling. The results highlight potential CPL...
A new type of chiroptical switch based on a bis-helicenic terpyridine, changing conformation upon Zn binding, has been designed.