Souad Abou Zeid, Liran Hu, Samy Remita et leurs collaborateurs ont récemment publié un article dans Materials Chemistry Frontiers "Radiolytic synthesis of rGO–PEDOT nanohybrids with enhanced functional properties"

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Hybrid reduced graphene oxide–poly(3,4-ethylenedioxythiophene) (rGO–PEDOT) nanocomposites were synthesized via green gamma-radiolysis under ambient conditions, without dopants or catalysts. Three distinct synthesis routes—including one-step simultaneous radiation induced reduction of aqueous graphene oxide (GO) and EDOT monomers and two-step approaches involving the reduction of GO in the presence of pre-formed PEDOT oligomers or polymers—were explored to assess the impact of absorbed dose and polymerization stage on the physicochemical and functional properties of the resulting materials. Extensive characterization techniques revealed that gamma-irradiation promotes effective GO reduction and controlled PEDOT polymerization, leading to significant band gap narrowing, enhanced structural ordering, and substantial increase in the carbon-to-oxygen atomic ratio (from 3.7 to 9.3) indicative of effective reduction and improved conjugation within the nanocomposites. Visual evolution confirmed kinetic-controlled composite formation, yielding hydrogel-like aggregates. Morphological analyses showed well-dispersed PEDOT on rGO sheets, contributing to improved thermal stability, enhanced optoelectronic properties and superior electrochemical performance. The composites exhibited enhanced specific capacitances up to ∼248 F g−1, surpassing many reported PEDOT-based materials, attributed to the synergistic combination of rGO's conductive network and PEDOT's pseudocapacitance. This green, catalyst-free, and scalable methodology offers a promising platform for fabricating multifunctional hybrid materials with potential applications in flexible electronics, energy storage devices, and sensing technologies.

Emeline Boyer, Carine Clavaguéra et leurs collaborateurs viennent de publier un article dans The Journal of Physical Chemistry B "Modeling the Vibrational Circular Dichroism Spectroscopy of Phenylcyclohexanediol Solvated in Dimethyl Sulfoxide Using Polarizable Molecular Dynamics". Ce travail se place dans le cadre du projet ANR Dichrosol (ISMO, ICP, LIPhy, CPCV).

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Modeling vibrational circular dichroism (VCD) spectra in solution remains a complex task due to the intricate interactions involved. Recent advances in computational chemistry, particularly the implementation of polarizable force fields, have greatly improved the description of environmental effects in classical molecular dynamics simulations. In this study, we use the AMOEBA polarizable model to calculate VCD spectra through the expression of the electric and magnetic dipole moments developed recently [Bowles, J. . ChemPhysChem 2024, 25, e202300982.] in combination with the use of induced dipole models. This methodology enables the reliable treatment of flexible molecules and has been applied to the 1-Phenyl-1,2-Cyclohexanediol (PC) molecule solvated in dimethyl sulfoxide (DMSO). The computed infrared and VCD spectra provide detailed insights into molecular conformations and solute–solvent interactions. An in-depth investigation was conducted into the possible effects of system size, concentration, and spectral convergence. Comparison with experimental vibrational frequencies in deuterated solvent further supports the interpretation of spectral features, although residual differences in the spectral shifts and broadenings prove to be challenging for theory, especially in the case of VCD.

Roland Thissen et ses collaborateurs ont récemment publié un article dans Icarus "Ion induced formation of complex organic nitrogen molecules in solid-phase adenine"

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Complex organic molecules have been found in many space environments like meteorites and comets. There, they are subjected to various forms of radiation (photons, electrons, ions), opening the question of their behavior and chemical evolution, which may have played a crucial role in chemical processes of astrobiological interest. In this study, we investigate the irradiation of adenine (CHN) with oxygen and neon ions. The free parameters of the experiments include varying energies (30-70 keV), temperatures (150, 300 K), sample thicknesses (138-554 nm), and ion fluences (0.69-5  10 ions cm). In situ IR spectroscopy reveals the appearance of CN and N=C=N bands indicating the formation of new species. Ex situ ultra-high-resolution mass spectrometry shows the formation of new complex organic molecules that far exceed the molecular mass of adenine. These macromolecules show great chemical diversity and can be expressed as (HCN)R families, where z can reach 14 and R can be C, H, N, NH, CH or CN. In total, nearly 100 individual families have been identified, 28 of which can be found in every irradiated sample. Their aromaticity equivalent is higher than that in other N-rich samples such as Titan tholins and HCN-polymers, corresponding to polycyclic aromatic nitrogen-bearing hydrocarbons. The high amount of nitrogen in these molecules indicates a very efficient incorporation of nitrogen in the solid phase during the irradiation of adenine. The ease with which complex organic matter forms through irradiation highlights the relevance of these species in space environments.

Souad Abou Zeid, Liran Hu, Samy Remita et leurs collaborateurs ont publié un article dans Materials Chemistry Frontiers "Gamma-induced one-step synthesis of reduced graphene oxide–silver nanoparticles with enhanced properties".

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This study presents a novel gamma-induced one-pot synthesis of reduced graphene oxide–silver nanoparticle (rGO–Ag NPs) nanocomposites. Syntheses were conducted in a deoxygenated aqueous medium containing 0.2 g L−1 graphene oxide (GO), silver ions (10−3 or 10−2 mol L−1), and 0.2 mol L−1 isopropanol at ambient temperature and pressure. Multi-technique characterization confirmed the reduction of GO and silver ions, forming nanocomposites with significantly improved physicochemical and electrochemical properties compared to pristine GO, rGO alone, and rGO–Ag NPs prepared by other methods. UV-Vis absorption spectroscopy revealed tunable optical properties, while UPS measurements provided insights into the energy band structure, highlighting interactions between rGO and Ag NPs that enhance electronic properties. XPS and ATR-FTIR confirmed the successful reduction processes. SEM–EDX analyses demonstrated uniform silver nanoparticle distribution on rGO sheets. The C/O ratio significantly increased after irradiation, with values of 10.8 and 9.6 for composites synthesized with 10−3 and 10−2 mol L−1 in silver ions, respectively, compared to 11.2 for rGO alone. Raman spectroscopy showed a lower intensity ratio (ID/IG) between D and G bands (1.18 for nanocomposites vs. 1.40 for rGO), indicating fewer structural defects. Improved thermal stability was evidenced by reduced weight loss (10%) at 300–800 °C. Electrochemical studies revealed exceptional specific capacitance values of 218 F g−1 (10−3 mol L−1 Ag+ at 50 kGy) and 298 F g−1 (10−2 mol L−1 Ag+ at 70 kGy), surpassing the 125.4 F g−1 for rGO alone. These findings highlight the potential of gamma-induced synthesis for producing rGO–Ag NPs nanocomposites for high-performance supercapacitor applications.

Meriem Baziz, Liran Hu, Samy Remita et leurs collaborateurs ont publié un article dans Polmer Bulletin : "Elaboration of Novel Biocomposite Hydrogel Polymers made of Alginate and Sepiolite and endowed with Enhanced Properties"

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Nowadays growing attention is given to the design and development of novel interpenetrating polymer networks (IPN) from the combination of hydrogel polymers loaded with natural clay. In this work, we used the eco-friendly IPN strategy to develop novel hydrogel biocomposite beads, made of alginate (ALG), with improved clay dispersion, higher pH sensitivity, better stretchability and swellability, together with enhanced regenerability properties and delayed biodegradability. Fibrous clay, namely, sodium sepiolite (NaS), was loaded into alginate simple biocomposite network (SBN) beads, via manual co-grinding mixture/encapsulation method, at different sepiolite loads. Alginate double biocomposite network (DBN) beads were also prepared at different sepiolite loads, via the diffusion of acrylamide monomers (AAM) inside alginate single biocomposite network (SBN) beads, followed by external and in situ free radical polymerization of AAM into polyacrylamide (pAAM), using ammonium persulfate (APS) as polymerization initiator and N,N-methylenebisacrylamide (Bis) as covalent crosslinker agent. The as-elaborated SBN and DBN beads were then characterized by digital camera recording, XRD analysis, ATR-FTIR characterization and SEM observation. FTIR results showed that NaS and pAAM were successfully incorporated into DBN beads, while partially exfoliated morphology was obtained with XRD analysis, which revealed the enhancement of fibrous clay dispersion, even at relatively high sepiolite loads. Besides, SEM microscopy confirmed the porous spongious nature of DBN beads. The properties of the as-elaborated SBN and DBN beads were also evaluated by test touching, swelling rate measurements, adsorption/desorption experiments and biodegradability evaluation. DBN beads properties were always found enhanced in comparison with those of SBN beads. This suggests that the synergetic effect between IPN and biocomposite structure improves the stretchability of the DBN beads, their stability in water whatever the pH and their swelling behavior (up to 2000 g/g adsorbed water after 110 min, which was nevertheless found dependent on the pH and on sepiolite load). Moreover, DBN beads displayed enhanced adsorption/desorption properties toward methylene blue (MB) dye (no reduction in MB adsorption capacity after 5 cycles), very good regenerability (ethanol being used as effective eluting agent) and delayed biodegradability (complete degradation only after 8 days in the presence of sepiolite). In summary, this work showed an interesting and safe IPN/biocomposite approach to develop high-performance alginate biocomposite polymers as a promising system toward their use in eco-friendly processes. 

La plateforme MUSIICS a été inaugurée le 19 décembre 2025 en présence de Camille GALAP, Président de l'Université Paris-Saclay, Sandrine Sagan, Directrice de CNRS Chimie, Loïc Bertrand, représentant du DIM Patrimoines matériels, Alessandro Morbidelli du PEPR Origins, et Olivier Mousson de la Région Ile de France.

L'inauguration a été complétée par des visites de plateformes et des présentations scientifiques illustrant le large éventail de possibilités de recherche offertes par MUSIICS.

La Journée Initiatives Pédagogiques JIP 2026 organisée par l’Université Paris-Saclay se tiendra le mercredi 1er avril 2026 à l'ENS Paris-Saclay. Le thème de cette journée est "De la ressource à la capacité : favoriser le pouvoir d'apprendre et le pouvoir d'agir". Pour cette 11ème édition, Solveig Fernagu, Directrice de recherche en sciences de l’éducation et de la formation est l'experte invitée.

Programme et inscription 

Applications are now open for The International School on Ultrafast X-ray and Attosecond Science 2026 June 1-5, 2026 on the Paris-Saclay Campus.

Detailed information on application requirements and deadlines is available on the event website 

La Division Chimie Physique de la SCF/SFP lance sa Campagne Annuelle des Prix DCP 2026. L’appel à candidatures est ouvert pour le Prix de Thèse, le Prix Jeune Chercheuse/Jeune Chercheur, le Prix Chercheuse Confirmée/Chercheur Confirmé et le Prix Instrumentation & Innovation. La date limite de dépôt des dossiers est le 15 avril 2026. Toutes les informations ainsi que les modèles de soumission se trouvent sur les pages suivantes :

● Prix « Jeune Chercheuse/Jeune Chercheur » 

● Prix « Chercheuse Confirmée/Chercheur Confirmé » 

● Prix de Thèse 

● Prix Instrumentation & Innovation 

La Société Chimique de France organise "Chimie au féminin" : une matinée consacrée à la mise en lumière de parcours féminins inspirants dans les sciences chimiques. Cet événement s'inscrit dans une dynamique plus large de valorisation des femmes chimistes, portée notamment par notre participation au projet des 72 femmes de sciences sur la Tour Eiffel, ainsi que par le numéro n°512 de l'Actualité Chimique qui consacré aux femmes chimistes. 📅 jeudi 26 mars 2026, de 9h à 13h 📍Amphithéâtre Charpak – Sorbonne Université – Campus Pierre et Marie Curie, Paris

Pour plus d'informations et pour participer 

La sub-division "Chimie sous Rayonnement Radiochimie" (SCF/SFP) organise son congrès autour des thématiques de la radiochimie, de la chimie sous rayonnement. Les 4èmes Rencontres Rayonnement Radiochimie (R3C) auront lieu  du 8 au 11 juin 2026 à l'Université Paris-Saclay (Orsay).

Dates clés :

- décembre 2025 : Ouverture des pré-inscriptions et dépôts d'abstracts

- 6 mars 2026 : Clotûre des dépôts d'asbtracts

- 31 mars : fin des tarifs "inscription anticipée"

- avril 2026 : Notifications aux auteurs

- 30 avril 2026 : Date limite d'inscription

Informations et inscription

Le Forum des Microscopies à Sondes Locales se tiendra du lundi 8 au vendredi 12 juin 2026 au Domaine de Saint-Paul à Saint-Rémy-lès-Chevreuse. 

Informations et inscription

- 6 mars 2026 : Date limite de soumission des résumés

- 31 mars 2026 : Fin du tarif réduit

- 30 avril 2026 : Clôture définitive des inscriptions

La prochaine réunion plénière du GDR EMIE aura lieu du 8 au 12 Juin 2026 à Toulouse. Les inscriptions sont dès à présent ouvertes

Informations et inscription 

DATES A RETENIR  :

Ouverture des inscriptions: 15 Février 2026    

Date limite d'inscription : 8 Avril 2026    

Date limite de soumission des contributions orales : 8 Avril 2026 Date limite de soumission des contributions par posters : 11 Mai 2026

APPEL A CANDIDATURE destiné aux chercheuses en chimie ayant interrompu pendant plusieurs mois leurs activités de recherche en raison d’un congé pour maternité.

La Fondation de la Maison de la Chimie offre de les aider lors de la reprise de travaux scientifiques et de mettre à leur disposition, pendant un an, les moyens de recruter un(e) chercheur(se) post-doctorant(e) choisi(e) par elles, dans les six mois qui suivent la fin du congé de maternité. Dossier de candidature à soumettre avant le 20 mars 2026.

Informations pratiques

Yassine Naciri, Wahid Ullah, Mohamed Nawfal Ghazzal et leurs collaborateurs ont publié récemment un article dans Advanced Functional Materials "GeAl 2-2x Fe 2x O 3 (OH) 4 nanotubes: new electrocatalyst for oxygen evolution reaction".

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Ge-imogolite nanotubes (Ge-INT) are analogs of natural clay nanotubes formed in volcanic soils that attract growing interest. Despite their amazing structural properties, their use in water oxidation has not been reported yet. In this work, the potential of Fe-doped double-walled germanium imogolite nanotubes as low-cost and noble metal-free electrocatalysts for oxygen evolution reaction (OER) is demonstrated for the first time. Nanotube samples are synthesized via a one-step hydrothermal method, with Fe substitution ratios x up to 0.075. Fe-doped nanotubes retain their tubular structure, and investigation indicated homogeneous Fe distribution all over the nanotubes. Comprehensive structural, spectroscopic, and electrochemical analyses confirm successful Fe incorporation and enhanced electrochemical performance. The sample with x = 0.05 Fe content shows the best OER performance, achieving a low overpotential of 285 mV at 10 mA cm−2, a Tafel slope of 175 mV dec−1, and excellent charge transfer properties. Fe-doped INT demonstrates strong electrochemical stability over prolonged operation. These results highlight the promising use of geo-inspired Fe-doped imogolite as a sustainable and credible nobel-free electrocatalyst for efficient OER, expanding the potential of imogolite-based nanomaterials in water oxidation.

Ces travaux ont également été mis en lumière par CNRS Chimie dans un communiqué Actualité dans Résultats scientifiques : "Des nanotubes d’argile inspirés de la nature pour produire de l’hydrogène sans métaux précieux"

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