Journal Article

FZJ-2022-05898

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Water Dynamics in Highly Concentrated Salt Solutions: A Multi‐Nuclear NMR Approach

Rezaie Ghaleh, N. (Corresponding author)FZJ*

2022
Wiley-VCH-Verl. Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/33207  doi:10.1002/open.202200080

Abstract: Living cells often contain compartments with high concentration of charged biomolecules. A key question pertinent to the function of biomolecules is how water dynamics are affected by interaction with charged molecules. Here, we study the dynamical behavior of water in an extreme condition, that is, in saturated salt solutions, where nearly all water molecules are located within the first hydration layer of ions. To facilitate disentangling the effects of cations and anions, our study is focused on alkali chloride solutions. Following a multi-nuclear NMR approach enabling direct monitoring of protons and the quadrupolar nuclei 7Li, 17O, 23Na, 35Cl, 87Rb and 133Cs, we investigate how the translational and rotational mobility of water molecules, chloride anion and corresponding cations are affected within the constrained environment of saturated solutions. Our results indicate that water molecules preserve a large level of mobility within saturated alkali chloride solutions that is significantly independent of adjacent ions.

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Contributing Institute(s):

1. Strukturbiochemie (IBI-7)

Research Program(s):

1. 5241 - Molecular Information Processing in Cellular Systems (POF4-524) (POF4-524)

Appears in the scientific report 2022

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