ArticleProceedings of the National Academy of Sciences of the United States of America2017
Molecular mechanism of water reorientational slowing down in concentrated ionic solutions.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- How Salt Solvation Slows Water Dynamics While Blue-Shifting Its Dielectric Spectrum.The journal of physical chemistry letters · 2025Article
- Asymmetric rotations slow down diffusion under confinement.Nature communications · 2025Article
- Universal dynamical onset in water at distinct material interfaces.Chemical science · 2022Article
- Article
- Hydration breaking and chemical ordering in a levitated NaCl solution droplet beyond the metastable zone width limit: evidence for the early stage of two-step nucleation.Chemical science · 2020Article
- Water dynamics in concentrated electrolytes: Local ion effect on hydrogen-bond jumps rather than collective coupling to ion clusters.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
- Reply to Stirnemann et al.: Frame retardation is the key reason behind the general slowdown of water reorientation dynamics in concentrated electrolytes.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
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Abstract
Water dynamics in concentrated ionic solutions plays an important role in a number of material and energy conversion processes such as the charge transfer at the electrolyte-electrode interface in aqueous rechargeable ion batteries. One long-standing puzzle is that all electrolytes, regardless of their "structure-making/breaking" nature, make water rotate slower at high concentrations. To understand this effect, we present a theoretical simulation study of the reorientational motion of water molecules in different ionic solutions. Using an extended Ivanov model, water rotation is decomposed into contributions from large-amplitude angular jumps and a slower frame motion which was studied in a coarse-grained manner. Bearing a certain resemblance to water rotation near large biological molecules, the general deceleration is found to be largely due to the coupling of the slow, collective component of water rotation with the motion of large hydrated ion clusters ubiquitously existing in the concentrated ionic solutions. This finding is at variance with the intuitive expectation that the slowing down is caused by the change in fast, single-molecular water hydrogen bond switching adjacent to the ions.
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