Defective continuous hydrogen-bond networks: an alternative interpretation of IR spectroscopy

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
Diedrich A Schmidt, Kazushi Miki

Abstract

We apply our previously developed deconvolution method and interpretation to analyze changes in the OH stretching band [nu(OH) band] of low-concentration (< or =0.2 m) aqueous solutions of NaCl and KCl. We treat these simple, monovalent ions as defects in the hydrogen-bond network of pure water and quantify the changes in the spectra at low defect concentration with an "order parameter". Order-parameter analysis of difference spectra of the two solutions leads to hydration numbers of 7.0+/-1.0 and 5.9+/-0.3 for K(+) and Na(+), respectively. Additionally, we find that changes in the nu(OH) band due to low concentrations of ions result from changes in the topology of the hydrogen-bond network.

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Citations

Aug 9, 2013·Physical Chemistry Chemical Physics : PCCP·Imre BakóJulianna Oláh
May 3, 2011·The Journal of Chemical Physics·Jean-Joseph Max, Camille Chapados
Jan 22, 2009·The Journal of Chemical Physics·Roberto ScipioniMauro Boero
Nov 18, 2009·The Journal of Chemical Physics·Jean-Joseph Max, Camille Chapados
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Jun 27, 2019·Environmental Science. Processes & Impacts·Subha Chakraborty, Tara F Kahan
Nov 26, 2009·The Journal of Physical Chemistry. B·N Galamba, B J Costa Cabral
Jun 9, 2009·The Journal of Physical Chemistry. a·Diedrich A SchmidtMauro Boero

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