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Issue 15, 2017
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Anionic and cationic Hofmeister effects are non-additive for guanidinium salts

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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

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Publication details

The article was received on 05 Feb 2017, accepted on 23 Mar 2017 and first published on 24 Mar 2017


Article type: Communication
DOI: 10.1039/C7CP00790F
Phys. Chem. Chem. Phys., 2017,19, 9724-9728
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    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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