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@article{1642199,
author = {Imrichová, Kamila and Veselý, Lukáš and Gasser, Tobias M. and Loerting, Thomas and Neděla, Vilém and Heger, Dominik},
article_location = {MELVILLE},
article_number = {1},
doi = {http://dx.doi.org/10.1063/1.5100852},
keywords = {ELECTRON-MICROSCOPY; SPECTROSCOPIC PROPERTIES; BROMOCRESOL PURPLE; GRAIN-BOUNDARIES; BUFFER SOLUTIONS; PH CHANGES; WATER; CHEMISTRY; CHLORIDE; CRYSTALLIZATION},
language = {eng},
issn = {0021-9606},
journal = {Journal of Chemical Physics},
title = {Vitrification and increase of basicity in between ice I-h crystals in rapidly frozen dilute NaCl aqueous solutions},
url = {https://aip.scitation.org/doi/10.1063/1.5100852},
volume = {151},
year = {2019}
}
TY - JOUR
ID - 1642199
AU - Imrichová, Kamila - Veselý, Lukáš - Gasser, Tobias M. - Loerting, Thomas - Neděla, Vilém - Heger, Dominik
PY - 2019
TI - Vitrification and increase of basicity in between ice I-h crystals in rapidly frozen dilute NaCl aqueous solutions
JF - Journal of Chemical Physics
VL - 151
IS - 1
SP - 1-11
EP - 1-11
PB - American Institute of Physics
SN - 00219606
KW - ELECTRON-MICROSCOPY
KW - SPECTROSCOPIC PROPERTIES
KW - BROMOCRESOL PURPLE
KW - GRAIN-BOUNDARIES
KW - BUFFER SOLUTIONS
KW - PH CHANGES
KW - WATER
KW - CHEMISTRY
KW - CHLORIDE
KW - CRYSTALLIZATION
UR - https://aip.scitation.org/doi/10.1063/1.5100852
L2 - https://aip.scitation.org/doi/10.1063/1.5100852
N2 - The freezing of ionic aqueous solutions is common in both nature and human-conducted cryopreservation. The cooling rate and the dimensions constraining the solution are known to fundamentally influence the physicochemical characteristics of the sample, including the extent of vitrification, morphology, and distribution of ions. The presence of some salts in an aqueous solution often suppresses the ice crystallization, allowing bulk vitrification during relatively slow cooling. Such a process, however, does not occur in NaCl solutions, previously observed to vitrify only under hyperquenching and/or in sub-micrometric confinements. This work demonstrates that, at freezing rates of >= 100 K min(-1), crystallized ice I-h expels the freeze-concentrated solution onto the surfaces of the crystals, forming lamellae and veins to produce glass, besides eutectic crystallization. The vitrification covers (6.8% +/- 0.6%) and (17.9% +/- 1.5%) of the total eutectic content in 0.06M and 3.4 mM solutions, respectively. The vitrified solution shows a glass-to-liquid transition succeeded by cold crystallization of NaCl 2H(2)O during heating via differential scanning calorimetry. We establish that ice crystallization is accompanied by increased basicity in freeze-concentrated solutions, reflecting preferential incorporation of chloride anions over sodium cations into the ice. After the sample is heated above the glass transition temperature, the acidity gradually returns towards the original value. The morphology of the samples is visualized with an environmental scanning electron microscope. Generally, the method of vitrifying the freeze-concentrated solution in between the ice I-h crystals via fast cooling can be considered a facile route towards information on vitrified solutions.
ER -
IMRICHOVÁ, Kamila, Lukáš VESELÝ, Tobias M. GASSER, Thomas LOERTING, Vilém NEDĚLA a Dominik HEGER. Vitrification and increase of basicity in between ice I-h crystals in rapidly frozen dilute NaCl aqueous solutions. \textit{Journal of Chemical Physics}. MELVILLE: American Institute of Physics, 2019, roč.~151, č.~1, s.~1-11. ISSN~0021-9606. Dostupné z: https://dx.doi.org/10.1063/1.5100852.
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