Letter/Communication
Communication: Stiff and soft nano-environments and the "octopus Effect "are the crux of ionic liquid structural and dynamical heterogeneity
The Journal of chemical physics, Vol.147(6), pp.061102-061102
2017
DOI: 10.1063/1.4990666
PMID: 28810794
Abstract
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.
Details
- Title: Subtitle
- Communication: Stiff and soft nano-environments and the "octopus Effect "are the crux of ionic liquid structural and dynamical heterogeneity
- Creators
- Ryan P DalyClaudio J MargulisJuan C Araque
- Resource Type
- Letter/Communication
- Publication Details
- The Journal of chemical physics, Vol.147(6), pp.061102-061102
- DOI
- 10.1063/1.4990666
- PMID
- 28810794
- NLM abbreviation
- J Chem Phys
- ISSN
- 0021-9606
- eISSN
- 1089-7690
- Grant note
- DOI: 10.13039/100000001, name: National Science Foundation, award: CHE-1362129
- Language
- English
- Date published
- 2017
- Academic Unit
- Chemistry
- Record Identifier
- 9983985701602771
Metrics
25 Record Views