Nouveauté : Toutes les publications par laboratoires de l’UFR de chimie regroupées
dans la collection hal.sorbonne-universite.fr/CHIMIE-SU
Electroactive properties of electrospun silk fibroin for energy harvesting applications
Silk fibroin (SF) is a sustainable material explored with success in the textile and biomedical industries. This protein has outstanding mechanical and electrical properties that could be used for advanced technological applications. In this work, silk fibroin fibrous membranes were processed by electrospinning, with conditions obtained through orthogonal experimental design.
Photoionization and dissociative photoionizationof propynal in the gas phase: theory and experiment
Propynal (HCCCHO) is a complex organic compound (COM) of astrochemical and astrobiologicalinterest. We present a combined theoretical and experimental investigation on the single photonionization of gas-phase propynal, in the 10 to 15.75 eV energy range. Fragmentation pathways of theresulting cation were investigated both theoretically and experimentally...
Pressure Reveals Unique Conformational Features in Prion Protein Fibril Diversity
Abstract: The prion protein (PrP) misfolds and assembles into a wide spectrum of self-propagating quaternary structures, designated PrPSc. These various PrP superstructures can be functionally different, conferring clinically distinctive symptomatology, neuropathology and infectious character to the associated prion diseases. However, a satisfying molecular basis of PrP structural diversity is lacking in the literature. To provide mechanistic insights into the etiology of PrP polymorphism, we have engineered a set of 6 variants of the human protein and obtained PrP amyloid fibrils. We show that pressure induces dissociation of the fibrils, albeit with different kinetics...
Electrodeposition of Silver Nanoparticles on Reduced Graphene Functionalized by Pyridine-Pyridazine Units...
Abstract: A new and versatile method to prepare Ag nanoparticles on functionalized graphene sheets is described. In a first step, pyridine‐pyridazine units are introduced on graphene sheets by cycloaddition reaction with a tetrazine derivative. Then the material is coated on an electrode and electrodeposition is carried out to generate silver nanoparticles in a one‐step electroreduction process. The applied potential signal is shown to influence the size and dispersity of the particles in the composite...
Line positions and intensities in the ν2 fundamental band...
Abstract: New experimental high-resolution Fourier-Tansform infrared spectra of the infrared active fundamental ν2 band of sulfuryl fluoride SO2F2, have been recorded at a temperature of 193 K and at resolution of 0.00102 cm at the AILES (Advanced Infrared Line Exploited for Spectroscopy) beamline of the SOLEIL (Source Optimisée de Lumière d’Energie intermédiaire du LURE) Synchrotron facility...
Stability of lauric acid at high pressure studied by Raman spectroscopy and picosecond acoustics
Lauric acid is commonly used as a coating agent which efficiently protects against oxidation and/or coalescence a set of inorganic nanocrystals obtained by chemical process...
Plasmon-enhanced inelastic scattering by 2D and 3D superlattices made of silver nanocrystals
Abstract: The lattice dynamics of natural crystals, artificial superlattices, or self‐organized nanocrystals intimately mix confinement, coupling, periodicity, and dissipative effects. The low wavenumber vibrational response of the new class of nanomaterials called “supercrystals” does contain relevant information concerning finite size effects on atomic movements inside each nanocrystal...
Electrodeposition of Silver Nanoparticles on Reduced Graphene...
Abstract: A new and versatile method to prepare Ag nanoparticles on functionalized graphene sheets is described. In a first step, pyridine‐pyridazine units are introduced on graphene sheets by cycloaddition reaction with a tetrazine derivative. Then the material is coated on an electrode and electrodeposition is carried out to generate silver nanoparticles in a one‐step electroreduction process. The applied potential signal is shown to influence the size and dispersity of the particles in the composite...
An alternative approach to create N-substituted cyclic dipeptides
N-Modified peptide backbones are promising peptidomimetics which offer several advantages in terms of improved biological activity and stability...
Role of Oleylamine Revisited: An Original Disproportionation Route to Monodispersed Cobalt and Nickel Nanocrystals
Abstract: Herein is highlighted an original disproportionation mechanism for the formation of hexagonal closed packed cobalt nanoparticles starting from low-valent cobalt complexes...