Hydrophobic hydration processes. General thermodynamic model by thermal equivalent dilution determinations

Biophysical Chemistry
E FisicaroA Braibanti

Abstract

The "hydrophobic hydration processes" can be satisfactorily interpreted on the basis of a common molecular model for water, consisting of two types of clusters, namely W(I) and W(II) accompanied by free molecules W(III). The principle of thermal equivalent dilution (TED) is the potent tool (Ergodic Hypothesis) employed to monitor the water equilibrium and to determine the number xi(w) of water molecules W(III) involved in each process. The hydrophobic hydration processes can be subdivided into two Classes: Class A includes those processes for which the transformation A(-xi(w)W(I)-->xi(w)W(II)+xi(w)W(III)+cavity) takes place with the formation of a cavity, by expulsion of xi(w) water molecules W(III) whereas Class B includes those processes for which the opposite transformation B(-xi(w)W(II)-xi(w)W(III)-->xi(w)W(I)-cavity) takes place with reduction of the cavity, by condensation of xi(w) water molecules W(III). The number xi(w) depends on the size of the reactants and measures the extent of the change in volume of the cavity. Disaggregating the thermodynamic functions DeltaH(app) and DeltaS(app) as the functions of T (or lnT) and xi(w) has enabled the separation of the thermodynamic functions into work and thermal components. T...Continue Reading

References

Jan 1, 1989·Annual Review of Biophysics and Biophysical Chemistry·P L Privalov
Jan 1, 1974·Annual Review of Biophysics and Bioengineering·J M Sturtevant
May 31, 2002·Nature·David Chandler
Sep 23, 2003·Biophysical Chemistry·Rufus Lumry
Aug 10, 2006·Journal of Molecular Recognition : JMR·Donald J Winzor, Craig M Jackson

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Citations

Apr 30, 2013·Colloids and Surfaces. B, Biointerfaces·Anne ValléeClaire-Marie Pradier
Mar 19, 2020·Public Health Nutrition·Wanhyung LeeHyoung-Ryoul Kim
Dec 16, 2018·Journal of Colloid and Interface Science·Bijan K PaulSaptarshi Mukherjee
Sep 24, 2019·The Journal of Physical Chemistry. B·Aritri BiswasBhabani S Mallik
Dec 7, 2018·Chemical Reviews·Teresa L MakoMindy Levine

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