A5019837574- Radioactive element chemistry and processing
- Analytical chemistry methods development
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Mass Spectrometry Techniques and Applications
- Radioactive contamination and transfer
- Atmospheric and Environmental Gas Dynamics
- Nanocluster Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical Analysis and Applications
- Electron Spin Resonance Studies
- Nuclear Materials and Properties
- Nuclear Physics and Applications
- X-ray Diffraction in Crystallography
- Spectroscopy and Laser Applications
- Crystallization and Solubility Studies
- Porphyrin and Phthalocyanine Chemistry
- Analytical Chemistry and Chromatography
- Chemical and Physical Properties in Aqueous Solutions
- Photochemistry and Electron Transfer Studies
- Hydrology and Watershed Management Studies
- Advanced Nanomaterials in Catalysis
- Flood Risk Assessment and Management
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced NMR Techniques and Applications
Centre National de la Recherche Scientifique
2013-2025
Institut Lumière Matière
2017-2025
Université Claude Bernard Lyon 1
2005-2025
Laboratoire Méditerranéen de Préhistoire Europe Afrique
2021-2024
Centre d'Études et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement
2016-2024
Université de Bordeaux
2005-2023
Bordeaux Population Health
2023
Sorbonne Université
2007-2022
Institut Parisien de Chimie Moléculaire
2007-2022
Centre Méditerranéen de Médecine Moléculaire
2013
Photoinduced magnetization has been recently evidenced by Hashimoto et al. in CoFe Prussian blue analogues. We synthesized three compounds with a variable cobalt environment to point out the conditions required observe photoinduced magnetization. Structure and electronic structure of have investigated combining XANES, infrared spectroscopy, powder X-ray diffraction experiments. Magnetization as function temperature before after irradiation showed that diamagnetic pairs CoIII−NC−FeII are...
Abstract To get more insight into plant cell response to cadmium (Cd) stress, both proteomic and metabolomic “differential display” analyses were performed on Arabidopsis thaliana cells exposed different concentrations of the toxic chemical. After a 24 h treatment, soluble proteins extracted from untreated treated separated by 2‐D‐PAGE image quantify compare protein levels. Proteins up‐ down‐regulated in Cd identified MS mapped specific metabolic pathways cellular processes, highlighting...
This article describes the studies of a photomagnetic cyanide-bridged Cu-Mo bimetallic assembly, Cu(II)(2)[Mo(IV)(CN)(8)].8H(2)O (Cu(II), S = (1)/(2); Mo(IV), 0) (1), which has an intervalence transfer (IT) band from Mo(IV)-CN-Cu(II) to Mo(V)-CN-Cu(I) around 480 nm. Wide-angle X-ray scattering and spectroscopic provide precise information about 3D connectivity local environment transition metal ions. Irradiating with blue light causes solid 1 exhibit spontaneous magnetization (Curie...
We synthesized a series of CoFe Prussian blue analogues along which we tuned the amount cesium cations inserted in tetrahedral sites structure. Structure and electronic structure have been investigated, combining XANES, infrared spectroscopy, powder X-ray diffraction experiments, magnetization measurements. The change induced by light shows that efficiency photoinduced magnetization, evidenced few years ago similar compounds Hashimoto et al. (Sato, O.; Iyoda, T.; Fujishima, A.; Hashimoto, K....
A CoFe Prussian blue analogue Rb1.8Co4[Fe(CN)6]3.3·13H2O was synthesized, which presents an important photomagnetic effect. The electronic structure and the local of ground excited states have been investigated. X-ray absorption spectroscopy measurements at Co Fe L2,3 edges cobalt K-edge (XANES EXAFS) evidence transfer spin change ions induced by irradiation. We observed a 0.19 Å increase Co−N bond length, associated with transformation CoIII low to CoII high spin. CoII/CoIII ratio has...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUranium Speciation in Solution by Time-Resolved Laser-Induced FluorescenceChristophe. Moulin, Pierre. Decambox, Valerie. and Jean Gary. DecaillonCite this: Anal. Chem. 1995, 67, 2, 348–353Publication Date (Print):January 15, 1995Publication History Published online1 May 2002Published inissue 15 January 1995https://pubs.acs.org/doi/10.1021/ac00098a019https://doi.org/10.1021/ac00098a019research-articleACS PublicationsRequest reuse permissionsArticle...
Time-resolved laser-induced fluorescence is a unique method for direct uranium speciation at low level in the framework of environmental studies. By varying pH and concentration absence carbonate ions fixed ionic strength, it was possible, together with free uranyl UO 2 2+ , to identify spectrally temporally all uranium-hydroxo complexes, namely, OH + (OH) 3 − (UO ) 5 7 .
Abstract The deposition of Mn 12 single molecule magnets on gold surfaces was studied for the first time using combined X‐ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) methods at low temperature. ability proposed approach to probe electronic structure magnetism complexes without significant sample damage successfully checked bulk samples. Detailed information oxidation state polarization manganese ions in adsorbates obtained from XAS XMCD spectra, respectively....
X-ray absorption spectra at the Co L2,3-edges were analyzed by means of ligand field multiplet calculations in different states three photomagnetic CoFe Prussian blue analogues chemical formula Cs2Co4[Fe(CN)6]3.3·11H2O, Rb2Co4[Fe(CN)6]3.3·11H2O and Na2Co4[Fe(CN)6]3.3·11H2O. These simulations experimental allowed quantification crystal parameter (10Dq). This determination led us (i) to evidence behaviors CoIII(LS) CoII(HS) ions three-dimensional structure related their electronic...
Abstract Characterisation of the molecular structure aquatic fulvic acids (FA) has been performed using a quadrupole time‐of‐flight (Q‐TOF) mass spectrometer equipped with an electrospray ionisation interface. Molecular masses centred around 450 Da and sinusoidal spectral distributions have obtained for all acids. Tandem spectrometry (MS/MS) experiments showed losses 18 (H 2 O) 44 (CO ), possible structures were determined first time to our knowledge. A methodology is reported evaluating...
In Part 2 of this work, the electronic and local structure photoinduced metastable magnetic state Prussian blue analogue Rb1.8Co4[Fe(CN)6]3.3-13H2O were characterized. To determine directly relative orientation moments Co(II) Fe(III) ions in state, nature exchange interaction between them, we performed X-ray circular dichroism (XMCD) experiments at cobalt iron K edges. We present first direct experimental evidence antiferromagnetic ions, leading to ferrimagnetism state.
Reaction of the Keggin-type polyanion [PW11O39]7- with tetrakis-carbene ruthenium precursor [RuLMe4Cl2] (LMe = 1,3-dimethylimidazolidine-2-ylidene), in water, results formation Na4K9[(PW9O34)2(cis-WO2)(cis-RuLMe2)].23H2O, which is first carbene derivative a polyoxometalate. The oxidation state confirmed by XANES experiments.
The surface sensitivity of X-ray Magnetic Circular Dichroism in extreme conditions is exploited to investigate the first layers bulk single-molecule magnets (SMM). Striking differences emerge between two classes SMM with different structural constraints, thus highlighting importance molecular design realization spintronic devices
Molecular complexes based on Prussian Blue analogues have recently attracted considerable interest for their unique bistable properties combined to ultimately reduced dimensions. Here, we investigate the first dinuclear FeCo complex exhibiting both thermal and photomagnetic bistability in solid state. Through an experimental theoretical approach combining local techniques-X-ray absorption spectroscopy (XAS), X-ray magnetic circular dichroism (XMCD), ligand field multiplet calculations-we...
Laser-induced breakdown spectroscopy (LIBS), a spectrochemical technique in which laser beam is used as the excitation source, was applied to detect trace elements contained uranium and plutonium dioxides. Partial spectra of plasmas, generated by focusing second harmonic (Λ = 532 nm) pulsed Nd:YAG on UO 2 PuO targets at atmospheric pressure, were recorded. Eighteen impurities concentrations about 500 ppm (μg/g) twelve 100 ppm, respectively, observed rich emission matrices . The possibility...
ESI mass spectrometry was used to investigate the europium complexation by tridentate ligands L ≡ 2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl)-pyridines (DATP) that have shown unique separation properties of actinides(III) from lanthanides(III) in nitric acid solutions. Complexes three ligands, namely methyl (DMTP), n-propyl (DnPTP), and iso-propyl (DiPTP), been investigated acidic solutions check aqueous-phase stability Eu(L)33+ ions identified previously solid state. The data obtained show,...
The 2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl)pyridines (DATPs) belong to a new family of extracting agents recently developed in the framework nuclear fuel reprocessing. These molecules exhibit exceptional properties separate actinides(III) from lanthanides(III) nitric acid solutions. A previous work showed that electrospray ionization mass spectrometry (ESI-MS) is reliable technique provide solution data such as stoichiometries and conditional stability constants various DATP complexes with...