Issue 15, 2017

Anionic and cationic Hofmeister effects are non-additive for guanidinium salts

Abstract

To understand specific ion effects on a molecular level we explore the effect of salts on the rotational mobility of a model amide using dielectric spectroscopy. Based on our previous studies on the effect of strong denaturing anions or cations, here we study the additivity of the anionic and cationic effect. Using salts consisting of denaturing spherical anions and spherical cations we find such salts to affect the amide according to what one expects based on the additive activity of the individual ions. The guanidinium (Gdm+) cation appears to be a notable exception, as our results suggest that GdmI (and accordingly GdmSCN) is less efficient in hindering the rotation of the amide than KI or GdmCl.

Graphical abstract: Anionic and cationic Hofmeister effects are non-additive for guanidinium salts

Supplementary files

Article information

Article type
Communication
Submitted
05 fev 2017
Accepted
23 mar 2017
First published
24 mar 2017
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2017,19, 9724-9728

Anionic and cationic Hofmeister effects are non-additive for guanidinium salts

V. Balos, M. Bonn and J. Hunger, Phys. Chem. Chem. Phys., 2017, 19, 9724 DOI: 10.1039/C7CP00790F

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