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@ARTICLE{Mohanakumar:910962,
author = {Mohanakumar, Shilpa and Kriegs, Hartmut and Briels, Willem
and Wiegand, Simone},
title = {{O}verlapping hydration shells in salt solutions causing
non-monotonic {S}oret coefficients with varying
concentration},
journal = {Physical chemistry, chemical physics},
volume = {24},
number = {44},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2022-04290},
pages = {27380-27387},
year = {2022},
abstract = {We investigate the thermodiffusive properties of aqueous
solutions of sodium iodide, potassium iodide and lithium
iodide, using thermal diffusion forced Rayleigh scattering
in a concentration range of 0.5–4 mol $kg^(-1)$ of
solvent, large enough to deal with associated salts, and a
temperature range of 15 to 45 °C. All systems exhibit
non-monotonic variations of the Soret coefficient $S_T$ with
concentration, with a minimum at one mol $kg^(-1)$ of
solvent in all three cases. We take this as an indication
that the relevant length and energy scales are very similar
in all cases. On this basis we develop an intuitive picture
in which the relevant objects are the fully hydrated salt
molecules, including all water molecules that behave
differently from bulk water. Preliminary, somewhat sketchy
calculations indicate that indeed Soret coefficients begin
to rise beyond concentrations where the fully hydrated
particles are randomly close packed. Indications are given
as to why the model will fail at large concentrations.},
cin = {IBI-4},
ddc = {540},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {36331005},
UT = {WOS:000879499200001},
doi = {10.1039/D2CP04089A},
url = {https://juser.fz-juelich.de/record/910962},
}