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General nature of liquid–liquid transition in aqueous organic solutions

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  • Ken-ichiro Murata

    (Institute of Industrial Science, University of Tokyo)

  • Hajime Tanaka

    (Institute of Industrial Science, University of Tokyo)

Abstract

The presence or absence of a liquid–liquid transition in water is one of the hot topics in liquid science, and while a liquid–liquid transition in water/glycerol mixtures is known, its generality in aqueous solutions has remained elusive. Here we reveal that 14 aqueous solutions of sugar and polyol molecules, which have an ability to form hydrogen bonding with water molecules, exhibit liquid–liquid transitions. We find evidence that both melting of ice and liquid–liquid transitions in all these aqueous solutions are controlled solely by water activity, which is related to the difference in the chemical potential between an aqueous solution and pure water at the same temperature and pressure. Our theory shows that water activity is determined by the degree of local tetrahedral ordering, indicating that both phenomena are driven by structural ordering towards ice-like local structures. This has a significant implication on our understanding of the low-temperature behaviour of water.

Suggested Citation

  • Ken-ichiro Murata & Hajime Tanaka, 2013. "General nature of liquid–liquid transition in aqueous organic solutions," Nature Communications, Nature, vol. 4(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3844
    DOI: 10.1038/ncomms3844
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    Cited by:

    1. Rizzatti, Eduardo Osório & Gomes Filho, Márcio Sampaio & Malard, Mariana & Barbosa, Marco Aurélio A., 2019. "Waterlike anomalies in the Bose–Hubbard model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 518(C), pages 323-330.

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