Hydrophobic and hydrophilic solute effects on the homogeneous nucleation temperature of ice from aqueous solutions

M. Oguni; C. A. Angell

doi:10.1021/j100234a005

Hydrophobic and hydrophilic solute effects on the homogeneous nucleation temperature of ice from aqueous solutions

M. Oguni, C. A. Angell

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27 Scopus citations

Abstract

A microcapillary technique has been employed to determine the homogeneous nucleation temperatures T_h of solutions of water and various oil-soluble solutes which cannot be investigated by means of emulsion techniques used previously for nucleation temperatures studies. A series of partly hydrophobic solutes as well as some hydrophilic solutes have been investigated in the low concentration region, X₂ ≤ 0.05. In all cases T_h decreased with increasing solute concentration, but it has been shown that the effect of each molecule can be analyzed in terms of additive contributions from each group in the molecule. On this basis it has been possible to estimate the value of T_h for solutions with totally hydrophobic character, such as the alkanes. The thermodynamic and structural relations between T_h and the temperature of maximum density T_md are tentatively discussed in terms of these results.

Original language	English (US)
Pages (from-to)	1848-1851
Number of pages	4
Journal	Journal of physical chemistry
Volume	87
Issue number	11
DOIs	https://doi.org/10.1021/j100234a005
State	Published - Jan 1 1983
Externally published	Yes

ASJC Scopus subject areas

General Engineering
Physical and Theoretical Chemistry

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abstract = "A microcapillary technique has been employed to determine the homogeneous nucleation temperatures Th of solutions of water and various oil-soluble solutes which cannot be investigated by means of emulsion techniques used previously for nucleation temperatures studies. A series of partly hydrophobic solutes as well as some hydrophilic solutes have been investigated in the low concentration region, X2 ≤ 0.05. In all cases Th decreased with increasing solute concentration, but it has been shown that the effect of each molecule can be analyzed in terms of additive contributions from each group in the molecule. On this basis it has been possible to estimate the value of Th for solutions with totally hydrophobic character, such as the alkanes. The thermodynamic and structural relations between Th and the temperature of maximum density Tmd are tentatively discussed in terms of these results.",

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AU - Oguni, M.

AU - Angell, C. A.

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N2 - A microcapillary technique has been employed to determine the homogeneous nucleation temperatures Th of solutions of water and various oil-soluble solutes which cannot be investigated by means of emulsion techniques used previously for nucleation temperatures studies. A series of partly hydrophobic solutes as well as some hydrophilic solutes have been investigated in the low concentration region, X2 ≤ 0.05. In all cases Th decreased with increasing solute concentration, but it has been shown that the effect of each molecule can be analyzed in terms of additive contributions from each group in the molecule. On this basis it has been possible to estimate the value of Th for solutions with totally hydrophobic character, such as the alkanes. The thermodynamic and structural relations between Th and the temperature of maximum density Tmd are tentatively discussed in terms of these results.

AB - A microcapillary technique has been employed to determine the homogeneous nucleation temperatures Th of solutions of water and various oil-soluble solutes which cannot be investigated by means of emulsion techniques used previously for nucleation temperatures studies. A series of partly hydrophobic solutes as well as some hydrophilic solutes have been investigated in the low concentration region, X2 ≤ 0.05. In all cases Th decreased with increasing solute concentration, but it has been shown that the effect of each molecule can be analyzed in terms of additive contributions from each group in the molecule. On this basis it has been possible to estimate the value of Th for solutions with totally hydrophobic character, such as the alkanes. The thermodynamic and structural relations between Th and the temperature of maximum density Tmd are tentatively discussed in terms of these results.

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Hydrophobic and hydrophilic solute effects on the homogeneous nucleation temperature of ice from aqueous solutions

Abstract

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