期刊
JOURNAL OF CHEMICAL PHYSICS
卷 147, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4990666
关键词
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资金
- U.S. National Science Foundation [CHE-1362129]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1362129] Funding Source: National Science Foundation
In a recent set of articles [J. C. Araque et al., J. Phys. Chem. B 119(23), 7015-7029 (2015) and J. C. Araque et al., J. Chem. Phys. 144, 204504 (2016)], we proposed the idea that for small neutral and charged solutes dissolved in ionic liquids, deviation from simple hydrodynamic predictions in translational and rotational dynamics can be explained in terms of diffusion through nano-environments that are stiff (high electrostriction, charge density, and number density) and others that are soft (charge depleted). The current article takes a purely solvent-centric approach in trying to provide molecular detail and intuitive visual understanding of time-dependent local mobility focusing on the most common case of an ionic liquid with well defined polar and apolar nano-domains. We find that at intermediate time scales, apolar regions are fluid, whereas the charge network is much less mobile. Because apolar domains and cationic heads must diffuse as single species, at long time the difference in mobility also necessarily dissipates. Published by AIP Publishing.
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