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On the cononsolvency behaviour of hydrophobic clusters in water-methanol solutions

Abstract

Simple calculations, grounded on the geometric approach to hydrophobic interaction, confirm the occurrence of a minimum in the Gibbs free energy change associated with the formation of several hard sphere clusters in water-methanol solutions with a methanol molar fraction around 0.3, at room temperature and atmospheric pressure. This finding is in line with the computer simulation results of Mochizuki and Koga [Phys.Chem.Chem.Phys., 2016, 18, 16188]. However, it is underscored that these results cannot be the basis for a rationalization of the cononsolvency phenomenon of polymers in water-methanol solutions. In fact, there is no Gibbs free energy minimum for the processes more closely resembling polymer collapse, i.e., those involving solely a change in the spatial organization of the same number of hard spheres.

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Publication details

The article was received on 25 Nov 2017, accepted on 09 Feb 2018 and first published on 10 Feb 2018


Article type: Paper
DOI: 10.1039/C7CP07943E
Citation: Phys. Chem. Chem. Phys., 2018, Accepted Manuscript
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    On the cononsolvency behaviour of hydrophobic clusters in water-methanol solutions

    A. Pica and G. Graziano, Phys. Chem. Chem. Phys., 2018, Accepted Manuscript , DOI: 10.1039/C7CP07943E

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