Vitrification and increase of basicity in between ice I-h crystals in rapidly frozen dilute NaCl aqueous solutions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F19%3A00508177" target="_blank" >RIV/68081731:_____/19:00508177 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/19:00108241

Result on the web

<a href="https://aip.scitation.org/doi/10.1063/1.5100852" target="_blank" >https://aip.scitation.org/doi/10.1063/1.5100852</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5100852" target="_blank" >10.1063/1.5100852</a>

Result language

angličtina

Original language name

Vitrification and increase of basicity in between ice I-h crystals in rapidly frozen dilute NaCl aqueous solutions

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GA19-08239S" target="_blank" >GA19-08239S: The Spectroscopy and Microscopy of Chemical Compounds in Ice within the Environmental and Pharmaceutical Domains</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Chemical Physics

ISSN

0021-9606

e-ISSN

—

Volume of the periodical

151

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

014503

UT code for WoS article

000474214600023

EID of the result in the Scopus database

2-s2.0-85068450375