Cited by 41Material Dynamics and PropertiesDiffusion Coefficients in LiquidsSpectroscopy and Quantum Chemical Studies

A Diffusive Anomaly of Water in Aqueous Sodium Chloride Solutions at Low Temperatures

Kim, Jun Soo, Yethiraj, Arun·2008·The Journal of Physical Chemistry B

Abstract

Molecular dynamics simulations are presented for the self-diffusion coefficient of water in aqueous sodium chloride solutions. At temperatures above the freezing point of pure water, the self-diffusion coefficient is a monotonically decreasing function of salt concentration. Below the freezing point of pure water, however, the self-diffusion coefficient is a non-monotonic function of salt concentration, showing a maximum at approximately one molal salt. This suggests that sodium chloride, which is considered a structure-making salt at room temperature, becomes a structure-breaking salt at low temperatures. A qualitative understanding of this effect can be obtained by considering the effect of ions on the residence time of water molecules near other water molecules. A consideration of the freezing point depression of aqueous sodium chloride solutions suggests that the self-diffusion coefficient of water in supercooled sodium chloride solutions is always higher than that in pure (supercooled) water at the same temperature.

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Crossref · 10.1021/jp076710+

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  • This frustration results in an increase in mobility for the water molecule in the nano-confined gap, rendering the sheared solution more viscous.

    “This results in an increase in mobility for the water molecule in the nano-confined gap, 50,69 rendering the sheared solution more viscous.”

    From Lubricating properties of single metal ions at interfaces (2018) · cites this paper as [69]

  • The ions' lubricating properties originate from their ability to disrupt the ordered molecular arrangement of nano-confined water molecules, thereby inducing a greater fluidity of the liquid.

    “This highlights the fact that the ions' lubricating properties originate from their ability to disrupt the ordered molecular arrangement of nano-confined water molecules, thereby inducing a greater fluidity of the liquid.50,69,[70][71][72]”

    From Lubricating properties of single metal ions at interfaces (2018) · cites this paper as [69]

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Authors
Kim, J. S., & Yethiraj, A.
Affiliations
University of Wisconsin–Madison (US)
Venue
The Journal of Physical Chemistry B
Published
2008-01-24
Volume
112
Issue
6
Pages
1729-1735
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W2084520751
Cited by
41
References
47
Citations by year
2026: 2 · 2025: 3 · 2024: 2 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 4 · 2012: 4
FWCI
2.38
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Physical Chemistry B (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Material Dynamics and Properties
  • Physical Sciences › Chemistry › Spectroscopy › Diffusion Coefficients in Liquids
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
Keywords
water self-diffusion coefficient, NaCl solution, supercooled water, salt concentration dependence, freezing point depression, water residence time
MeSH terms
Chemistry, Physical, Diffusion, Freezing, Sodium Chloride, Solutions, Temperature, Water, Chemical Phenomena

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