• Thèse

Use of unconventional activation methods for the oxidative cleavage of lignin by dioxygen, Utilisation de moyens d’activation non-conventionnels pour le clivage oxydant de la lignine par le dioxygène

Louay Al-Hussaini

Due to the depletion of fossil resources, the interest of lignin as a sustainable alternative to petroleum is growing. Thus, the main purpose of this thesis was to develop a process for oxidative cleavage of lignin by dioxygen that involves unconventional methodologies like sonochemistry and ball-…, Du fait de l'épuisement des ressources fossiles, l'intérêt de la lignine en tant qu'alternative durable est grandissant. Ainsi, le but principal de cette thèse était de mettre au point un procédé de clivage oxydant de la lignine par le dioxygène qui implique des voies non…

Other. Sorbonne Université, 2019. English. ⟨NNT : 2019SORUS448⟩. ⟨tel-03463302⟩

• Article dans une revue

Dimerization of Uracil in a simulated Mars-like UV radiation environment

Laura Rouquette, Fabien Stalport, Hervé Cottin, Cyril Colas, Thomas Georgelin, Naïla Chaouche-Mechidal, Jerome Lasne, Sara Mahfouf, Franćois Raulin, Laura Selliez, Cyril Szopa, Patrice Coll

The search for organic molecules at the surface of Mars is a key objective in astrobiology, given that many organic compounds are possible biosignatures and their presence is of interest with regard to the habitability of Mars. Current environmental conditions at the martian surface are harsh and…

Astrobiology, 2020, 20 (11), pp.1363-1376. ⟨10.1089/ast.2019.2157⟩. ⟨hal-03032302⟩

• Poster de conférence

Fate of Organic Molecules in the Mars Regolith Under UV Radiation Deduced from the MOMIE Laboratory Experiment

Cyril Szopa, Patrice Coll, Fabien Stalport, Olivier Poch, Maguy Jaber, Jean-François Lambert, Laura Rouquette, Jérôme Lasne

Among bioindicators or biosigna- tures, organic molecules present on Mars could be re- trieved in the regolith near the surface due to erosion of rocks and gardening of the soil from meteorites bom- bardment through the Mars history. Once their, the organic molecules are submitted to the harsh…

• Article dans une revue

Light-induced infrared difference spectroscopy on three different forms of orange carotenoid protein: focus on carotenoid vibrations

Silvia Leccese, Adjélé Wilson, Diana Kirilovsky, Riccardo Spezia, Claude Jolivalt, Alberto Mezzetti

Orange carotenoid protein (OCP) is a photoactive carotenoprotein involved in photoprotection of cyanobacteria, which uses a keto-catorenoid as a chromophore. When it absorbs blue-green light, it converts from an inactive OCPO orange form to an activated OCPR red form, the latter being able to bind…

Photochemical & Photobiological Sciences , 2023, 22 (6), pp.1379-1391. ⟨10.1007/s43630-023-00384-7⟩. ⟨hal-04225642⟩

• Thèse

Molecules at surfaces : formation, reactivity, assembly of (bio)molecules on external and internal surfaces of nanosized/nanostructured materials, Molécules aux surfaces : formation, réactivité, assemblage de (bio) molécules sur les surfaces externes et internes de matériaux nanométriques / nanostructurés

Ola El Samrout

This PhD thesis aims to deeply study the polymerization of Gly monomers on amorphous silica to better understand its reaction mechanism, kinetics, and parameters related to the nature of the condensation product obtained under different environmental conditions. In the first part, the behavior of…, Cette thèse vise à étudier en profondeur la polymérisation des monomères Gly sur de la silice amorphe afin de mieux comprendre son mécanisme réactionnel, sa cinétique et les paramètres liés à la nature du produit de condensation obtenu dans différentes conditions environnementales. Dans la première…

Material chemistry. Sorbonne Université; Università degli studi (Turin, Italie), 2023. English. ⟨NNT : 2023SORUS085⟩. ⟨tel-04138067⟩

• Thèse

Defects in ZnO nanoparticles obtained by gas-phase syntheses, Défauts dans les nanoparticules de ZnO obtenues par synthèses en phase gazeuse

Miao Zhang

By far, the assignment of defects-related spectroscopic features of zinc oxide is still a matter of great controversy. This is probably due to the variety of possible defects in ZnO as well as to their still uncertain formation energies and positions within the band gap. Uncontrolled measurement…, L’attribution des signatures spectrales liées aux défauts dans l’oxyde de zinc fait encore l’objet de controverses. Ceci est probablement dû à la grande variété de défauts possibles, à l’incertitude de leur niveau d’énergie ainsi que leur énergie de formation dans la bande interdite. De plus, l’…

Chemical Sciences. Sorbone Université; ED, 2017. English. ⟨NNT : ⟩. ⟨tel-03952778⟩

• Article dans une revue

Advantages of Covalent Immobilization of Metal‐Salophen on Amino‐Functionalized Mesoporous Silica in Terms of Recycling and Catalytic Activity for CO 2 Cycloaddition onto Epoxides

Matthieu Balas, Sébastien Beaudoin, Anna Proust, Franck Launay, Richard Villanneau

NiII and MnIII Schiff base complexes (Salophen-Ni and Salophen-MnCl) bearing a pending carboxylic group were prepared and characterized. Both complexes were grafted onto a mesoporous amino-functionalized SBA-15 silica, by formation of an amide function between the propylamine groups of the support…

European Journal of Inorganic Chemistry, 2021, 2021 (16), pp.1581-1591. ⟨10.1002/ejic.202100150⟩. ⟨hal-03485785⟩

• Article dans une revue

Loop-stabilized BAB triblock copolymer morphologies by PISA in water

Pauline Biais, Patricia Beaunier, François Stoffelbach, Jutta Rieger

A straightforward strategy to synthesize in water, loop-stabilized particles via PISA is developed. These particular structures can in theory be obtained through the synthesis of amphiphilic BAB triblock copolymers, starting from a hydrophilic middle block A, which is chain extended in an aqueous…

Polymer Chemistry, 2018, 9 (35), pp.4483-4491. ⟨10.1039/C8PY00914G⟩. ⟨hal-02374121⟩

• Article dans une revue

Halide-free CO 2 cycloaddition onto styrene oxide catalysed by first row transition-metal derivatives of polyoxotungstates

Jingjing Ren, Franck Launay, Richard Villanneau, Anna Proust

Quaternary ammonium salts of metal derivatives of polyoxometalates [XW11O39M(H2O)]n- (X = P, Si; M = Cr, Mn, Co, Ni, Zn) were successfully tested instead of quaternary ammonium halides as catalysts in the cycloaddition of CO2 to styrene oxide. Remarkably, they gave very satisfactory yields of…

Chemical Communications, 2024, ⟨10.1039/D4CC00522H⟩. ⟨hal-04545491⟩

• Article dans une revue

Coupled quartz crystal microbalance – Surface enhanced Raman scattering strategy for the design and testing of aptasensors for small analytes

Médéric Lequeux, Michèle Salmain, Jean-Marc Krafft, Jakub Dostalek, Anne Vallée, Alexis Loiseau, Wolfgang Knoll, Marc Lamy de la Chapelle, Souhir Boujday

Both quartz crystal microbalance with dissipation (QCM-D) and Surface Enhanced Raman Scattering (SERS) stand at the forefront of label-free transducing techniques to trace and monitor biomolecular association events occurring at solid-liquid interfaces. Although these techniques provide highly…

Sensors and Actuators B: Chemical, 2025, 442, pp.138154. ⟨10.1016/j.snb.2025.138154⟩. ⟨hal-05139145⟩