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Analysis of the structure of aqueous solutions of isopropanol based on optical, volumetric, and elastic data

  • Physical Chemistry of Solutions
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Abstract

The curve of the concentration dependence of the total molecular light scattering coefficient of xC3H7OH-(1 − x)H2O solutions showed two sharp maxima (at x = 0.04 and 0.09) and a minimum at x = 0.06 mole fractions, suggesting a considerable rearrangement of the structure of the solutions near these concentrations. The concentration dependences of excess molar volume, adiabatic compressibility, and molar refraction showed negative deviations from the ideal with a minimum in the range x = 0.18–0.3. The structure of water was assumed to undergo a rearrangement at x = 0.04 accompanied by structural fluctuations, which dispersed at 0.04 < x < 0.06. At x = 0.06, associates of isopropanol molecules started to form, whose number and size increased linearly up to x = 0.13. In the 0.13 < x < 0.35 concentration range, some kind of an aqueous alcohol emulsion containing pure alcohol “nanodrops” formed and the solutions became microheterogeneous.

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Authors and Affiliations

  1. Department of Chemistry, Moscow State University, Moscow, Russia

    A. I. Abramovich & L. V. Lanshina

Authors
  1. A. I. Abramovich
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  2. L. V. Lanshina
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Correspondence to A. I. Abramovich.

Additional information

Original Russian Text © A.I. Abramovich, L.V. Lanshina, 2015, published in Zhurnal Fizicheskoi Khimii, 2015, Vol. 89, No. 7, pp. 1116–1121.

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Abramovich, A.I., Lanshina, L.V. Analysis of the structure of aqueous solutions of isopropanol based on optical, volumetric, and elastic data. Russ. J. Phys. Chem. 89, 1211–1215 (2015). https://doi.org/10.1134/S003602441507002X

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  • DOI: https://doi.org/10.1134/S003602441507002X

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