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Interactions in 1-propanol-(1,2-and 1,3-)propanediol-H2O: The effect of hydrophobic vs hydrophilic moiety on the molecular organization of H2O

TitleInteractions in 1-propanol-(1,2-and 1,3-)propanediol-H2O: The effect of hydrophobic vs hydrophilic moiety on the molecular organization of H2O
Publication TypeJournal Article
Year of Publication2002
AuthorsParsons, MT, Koga, Y
JournalJournal of Physical Chemistry B
Volume106
Pagination7090-7095
Date PublishedJul
Type of ArticleArticle
ISBN Number1520-6106
Keywords25-DEGREES-C, AQUEOUS MIXTURES, CHEMICAL-POTENTIALS, MIXING SCHEMES, NON-ELECTROLYTES, NONELECTROLYTES, PARTIAL MOLAR ENTHALPIES, TERT-BUTANOL, VOLUMES, WATER-RICH REGION
Abstract

The excess partial molar enthalpy and the excess chemical potential of 1-propanol in ternary systems 1-propanol-(1,2- and 1,3-)propanediols-H2O were determined. The enthalpic interaction function between 1-propanol molecules was evaluated. The mole fraction dependence of the 1-propanol-1-propanol interaction function was used as a probe to elucidate the effect of 1,2- and 1,3-propanediols on the molecular organization of H2O. Together with the earlier similar works on 2-propanol and glycerol, we conclude that the hydrophobic moiety diminishes the hydrogen bond connectivity of H2O by reducing the hydrogen bond probability of bulk H2O, while the effect of the hydropbilic moiety is primarily to reduce the degree of fluctuation inherent in liquid H2O.

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