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@ARTICLE{Sieme:1021665,
author = {Sieme, Daniel and Rezaei-Ghaleh, Nasrollah},
title = {{W}ater dynamics in eutectic solutions of sodium chloride
and magnesium sulfate: implications for life in {E}uropa's
subsurface ocean and ice shell},
journal = {Physical chemistry, chemical physics},
volume = {26},
number = {1},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {FZJ-2024-00921},
pages = {105 - 115},
year = {2024},
abstract = {Liquid water is essential for life as we know it and the
coupling between water and biomolecular dynamics is crucial
for life processes. Jupiter's moon Europa is a good
candidate for searching for extraterrestrial life in our
outer solar system, mainly because a liquid water salty
ocean in contact with a rocky seafloor underlies its ice
shell. Little, however, is known about the chemical
composition of the subglacial ocean of Europa or the brine
pockets within its ice shell and their impacts on water
dynamics. Here, we employ 1H, 17O, 23Na and 35Cl NMR
spectroscopy, especially NMR spin relaxation and diffusion
methods, and investigate the mobility of water molecules and
ions in eutectic solutions of magnesium sulfate and sodium
chloride, two salts ubiquitously present on the surface of
Europa, over a range of temperatures and pressures pertinent
to Europa's subglacial ocean. The NMR data demonstrate the
more pronounced effect of magnesium sulfate compared with
sodium chloride on the mobility of water molecules. Even at
its much lower eutectic temperature, the sodium chloride
solution retains a relatively large level of water mobility.
Our results highlight the higher potential of a sodium
chloride-rich than magnesium sulfate-rich Europa's ocean to
accommodate life and support life origination within the
eutectic melts of Europa's ice shell.},
cin = {IBI-7},
ddc = {540},
cid = {I:(DE-Juel1)IBI-7-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
pubmed = {38054803},
UT = {WOS:001114430900001},
doi = {10.1039/D3CP03455K},
url = {https://juser.fz-juelich.de/record/1021665},
}