Effects Of H+ And OH− On H2O As Probed By The 1-propanol ...

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Physical Chemistry Chemical Physics

Effects of H+ and OH− on H2O as probed by the 1-propanol probing methodology: differential thermodynamic approach†

Yoshikata Koga, *a Kumiko Miki b and Keiko Nishikawa c Author affiliations

* Corresponding authors

a Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada, and Suitekijuku, Vancouver, BC, Canada E-mail: [email protected]

b Department of Liberal Arts and Basic Sciences, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575, Japan

c Graduate School of Advanced Integration Science, Chiba University, Chiba 263-8522, Japan

Abstract

We applied what we call the “1-propanol (1P) probing methodology” on the effects of H+ and OH− on liquid H2O. We found that H+ is an amphiphile with a modest hydrophobic and an equally modest hydrophilic contribution. Its hydration number is 2 ± 1, suggesting that the equilibrium hydration structure is like the Zundel type (H5O2+). OH−, on the other hand, has a large hydration shell with 12 ± 3 H2O molecules and acts as a hydrophobe-like hydration center. In other words, it forms a hydration shell around itself, but as the probing 1P increases and the available H2O decreases, it exerts its influence over a longer range and reduces the hydrogen-bond probability of bulk H2O away from hydration shells, just as a hydrophobe does to bulk H2O.

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Article information

DOI https://doi.org/10.1039/C7CP05519F Article type Paper Submitted 13 Aug 2017 Accepted 20 Sep 2017 First published 20 Sep 2017

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Phys. Chem. Chem. Phys., 2017,19, 27413-27420 BibTex EndNote MEDLINE ProCite ReferenceManager RefWorks RIS

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Effects of H+ and OH− on H2O as probed by the 1-propanol probing methodology: differential thermodynamic approach

Y. Koga, K. Miki and K. Nishikawa, Phys. Chem. Chem. Phys., 2017, 19, 27413 DOI: 10.1039/C7CP05519F

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