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@ARTICLE{Lee:1023708,
author = {Lee, Namkyu and Mohanakumar, Shilpa and Briels, Willem and
Wiegand, Simone},
title = {{N}on-monotonic {S}oret coefficients of aqueous {L}i{C}l
solutions with varying concentrations},
journal = {Physical chemistry, chemical physics},
volume = {26},
number = {9},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2024-01765},
pages = {7830 - 7836},
year = {2024},
note = {data can be found at 10.5281/zenodo.10666454},
abstract = {We investigate the thermodiffusive properties of aqueous
solutions of lithium chloride, using thermal diffusion
forced Rayleigh scattering in a concentration range of 0.5
– 2 mole per kg of solvent and a temperature range of 5 to
45°C. All solutions exhibit non-monotonic variations of the
Soret coefficient $S_T$ with concentration exhibiting a
minimum at about one mole per kg of solvent. The depth of
the minimum decreases with increasing temperature and shifts
slightly towards higher concentrations. We compare the
experimental data with published data and apply a recent
model based on overlapping hydration shells. Additionally,
we calculate the ratio of the phenomenological Onsager
coefficients $L_{1q}'/{L_{11}$ using our experimental
results and published data to calculate the thermodynamic
factor. Simple linear, quadratic and exponential functions
can be used to describe this ratio accurately and together
with the thermodynamic factors the experimental Soret
coefficients can be reproduced. The main conclusion from
this analysis is that the minimum in the Soret coefficients
results from a maximum in the thermodynamic factor, which
appears itself at concentrations far below the experimental
concentrations. Only after multiplication with the
(negative) monotonous Onsager ratio does the minimum move
into the experimental concentration window.},
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 = {38375894},
UT = {WOS:001166404200001},
doi = {10.1039/D3CP06061F},
url = {https://juser.fz-juelich.de/record/1023708},
}