Changes in the IR Spectra of Aqueous Solutions of Alkali Metal Chlorides during Crystallization

The IR spectra of aqueous solutions of sodium chloride and rubidium chloride with the same concentration of 0.1 M upon freezing are studied in the middle IR region. The changes that occur in the absorption bands of the bending ν 2 , compound ν 2 + ν L , and stretching (ν 1 , 2ν 2 , and ν 3 ) vibrati...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2018-02, Vol.92 (2), p.310-314
Main Authors: Koroleva, A. V., Matveev, V. K., Koroleva, L. A., Pentin, Yu. A.
Format: Article
Language:English
Subjects:
Absorption spectra
Alkali metals
Aqueous solutions
Chemistry
Chemistry and Materials Science
Crystallization
Infrared spectroscopy
Metal chlorides
Physical Chemistry
Rubidium halides
Sodium chloride
Structure of Matter and Quantum Chemistry
Water chemistry
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Summary:The IR spectra of aqueous solutions of sodium chloride and rubidium chloride with the same concentration of 0.1 M upon freezing are studied in the middle IR region. The changes that occur in the absorption bands of the bending ν 2 , compound ν 2 + ν L , and stretching (ν 1 , 2ν 2 , and ν 3 ) vibrations of water molecules with gradual crystallization of the solutions are studied. The obtained spectra of crystallized solutions are compared to the IR spectrum of ice Ih. Analysis allows conclusions about the structure of the investigated frozen crystallized solutions.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024418020139