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991.
Hélène D.S. Guerrand Ludovic D. Marciasini Thomas Gendrineau Oana Pascu Samuel Marre Sandra Pinet Michel Vaultier Cyril Aymonier Mathieu Pucheault 《Tetrahedron》2014
Palladium nanoparticles have been prepared using different techniques, CO2-assisted microfluidics coflow or thermolysis using ionic liquids. Both techniques displayed interesting activities in dehydrogenation of diisopropylamine–borane complex, and allowed performing a dehydrogenation–arylation sequence with the creation of a carbon–boron bond. 相似文献
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996.
Hassan Srour Olivier Ratel Mathieu Leocmach Emma A. Adams Sandrine Denis‐Quanquin Vinukrishnan Appukuttan Nicolas Taberlet Sbastien Manneville Jean‐Charles Majest Christian Carrot Chantal Andraud Cyrille Monnereau 《Macromolecular rapid communications》2015,36(1):55-59
Tuning the chain‐end functionality of a short‐chain cationic homopolymer, owing to the nature of the initiator used in the atom transfer radical polymerization (ATRP) polymerization step, can be used to mediate the formation of a gel of this poly(electrolyte) in water. While a neutral end group gives a solution of low viscosity, a highly homogeneous gel is obtained with a phosphonate anionic moiety, as characterized by rheometry and diffusion nuclear magnetic resonance (NMR). This novel type of supramolecular control over poly(electrolytic) gel formation could find potential use in a variety of applications in the field of electro‐active materials.
997.
Mathieu Guerain Patrick Derollez Luisa Roca-Paixo Catherine Dejoie Natlia T. Correia Frdric Affouard 《Acta Crystallographica. Section C, Structural Chemistry》2020,76(3):225-230
The crystal structure of a new cocrystal of carbamazepine (systematic name: 5H‐dibenzo[b,f]azepine‐5‐carboxamide, C15H12N2O) and dl ‐tartaric acid (C4H6O6), obtained by liquid‐assisted grinding, was solved by powder X‐ray diffraction (PXRD). The high‐resolution PXRD pattern of this new phase was recorded at room temperature thanks to synchrotron experiments at the European Synchrotron Radiation Facility (Grenoble, France). The starting structural model was generated by a Monte‐Carlo simulated annealing method. The final structure was obtained through Rietveld refinement and an energy minimization simulation was used to estimate the H‐atom positions. The stability of the proposed structure as a function of temperature was also assessed from molecular dynamics simulations. The symmetry is monoclinic (space group P21/c) and contains eight molecules per unit cell, namely, four dl ‐tartaric acid and four carbamazepine molecules. 相似文献
998.
DNA-templated self-assembly represents a rich and growing subset of supramolecular chemistry where functional self-assemblies are programmed in a versatile manner using nucleic acids as readily-available and readily-tunable templates. In this review, we summarize the different DNA recognition modes and the basic supramolecular interactions at play in this context. We discuss the recent results that report the DNA-templated self-assembly of small molecules into complex yet precise nanoarrays, going from 1D to 3D architectures. Finally, we show their emerging functions as photonic/electronic nanowires, sensors, gene delivery vectors, and supramolecular catalysts, and their growing applications in a wide range of area from materials to biological sciences. 相似文献
999.
Dr. Mathieu Fossépré Prof. Inbal Tuvi-Arad Prof. David Beljonne Dr. Sébastien Richeter Prof. Sébastien Clément Prof. Mathieu Surin 《Chemphyschem》2020,21(23):2543-2552
Water-soluble π-conjugated polymers are increasingly considered for DNA biosensing. However, the conformational rearrangement, supramolecular organization and dynamics upon interaction with DNA have been overlooked, which prevents the rational design of such detection tools. To elucidate the binding of a cationic polythiophene (CPT) to DNA with atomistic resolution, we performed molecular simulations of their supramolecular assembly. Comparison of replicated simulations show a multiplicity of CPT binding geometries that contribute to the wrapping of CPT around DNA. The different binding geometries are stabilized by both electrostatic interactions between CPT lateral cations and DNA phosphodiesters and van der Waals interactions between the CPT backbone and the DNA grooves. Simulated circular dichroism (CD) spectra show that the induced CD signal stems from a conserved geometrical feature across the replicated simulations, i. e. the presence of segments of syn configurations between thiophene units along the CPT chain. At the macromolecular scale, we inspected the different shapes related to the CPT binding modes around the DNA through symmetry metrics. Altogether, molecular dynamics (MD) simulations, model Hamiltonian calculations of the CD spectra, and symmetry indices provide insights into the origin of induced chirality from the atomic to the macromolecular scale. Our multidisciplinary approach points out the hierarchical aspect of CPT chiral organization induced by DNA. 相似文献
1000.
Dr. Roza Bouchal Dr. Zhujie Li Chandra Bongu Steven Le Vot Dr. Romain Berthelot Dr. Benjamin Rotenberg Dr. Frederic Favier Dr. Stefan A. Freunberger Prof. Mathieu Salanne Dr. Olivier Fontaine 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(37):16047-16051
Water-in-salt electrolytes based on highly concentrated bis(trifluoromethyl)sulfonimide (TFSI) promise aqueous electrolytes with stabilities nearing 3 V. However, especially with an electrode approaching the cathodic (reductive) stability, cycling stability is insufficient. While stability critically relies on a solid electrolyte interphase (SEI), the mechanism behind the cathodic stability limit remains unclear. Now, two distinct reduction potentials are revealed for the chemical environments of free and bound water and that both contribute to SEI formation. Free water is reduced about 1 V above bound water in a hydrogen evolution reaction (HER) and is responsible for SEI formation via reactive intermediates of the HER; concurrent LiTFSI precipitation/dissolution establishes a dynamic interface. The free-water population emerges, therefore, as the handle to extend the cathodic limit of aqueous electrolytes and the battery cycling stability. 相似文献