Unexpected molecular dynamics of ethanol in hydrogen-bonded binary mixtures, ethanol-octanol and ethanol-water
| العنوان: | Unexpected molecular dynamics of ethanol in hydrogen-bonded binary mixtures, ethanol-octanol and ethanol-water |
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| المؤلفون: | Ingo Hoffmann, Firoz Malayil Kalathil, Tobias Lopian, Didier Touraud, Orsolya Czakkel, Marie Plazanet, Christiane Alba-Simionesco |
| المساهمون: | Institut Laue-Langevin (ILL), Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Universität Regensburg (UR), Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), LLB - Matière molle et biophysique (MMB), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institute of Physical and Theoretical Chemistry, Universität Regensburg |
| المصدر: | EPJ Web of Conferences EPJ Web of Conferences, 2022, QENS/WINS 2022 – 15th Edition of the QENS Series and 10th of the WINS Workshops San Sebastian (Online), Spain, May 23-27, 2022, 272, pp.01003. ⟨10.1051/epjconf/202227201003⟩ EPJ Web of Conferences, 2022, 272, pp.01003. ⟨10.1051/epjconf/202227201003⟩ |
| بيانات النشر: | HAL CCSD, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph] |
| الوصف: | International audience; In view of getting a quantitative picture of the dynamics in mixtures of hydrogen-bonded liquids, in particular the ternary water-ethanol-octanol, we examine in this paper the dynamics of two binary systems: ethanol-water and ethanol-octanol. Our multiscale investigation includes quasi-elastic neutron scattering for the characterization of the dynamics at the molecular scale, completed by NMR at the mesoscopic scale and eventually compared with macroscopic viscosity properties. We highlight the decrease of diffusivity in pure alcohols when increasing the lengthscale and conjecture its relation with the two processes measured in dielectric spectroscopy. While the behaviour of ethanol-water is well understood, unexpected inversion of the slowest component between the micro and the mesoscale are evidenced in the ethanol-octanol mixture. This effect could be at the origin of the negative viscosity excess in the mixture of alcohols. |
| اللغة: | English |
| تدمد: | 2100-014X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b250166d3222d1d6801c5cde23bd45a6 https://hal.science/hal-03876668 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....b250166d3222d1d6801c5cde23bd45a6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 2100014X |
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