Probing ion-specific effects on aqueous acetate solutions: Ion pairing versus water structure modifications

Tristan Petit; Kathrin M. Lange; Gerrit Conrad; Kenji Yamamoto; Christoph Schwanke; Kai F. Hodeck; Marcus Dantz; Tim Brandenburg; Edlira Suljoti; Emad F. Aziz

doi:10.1063/1.4884600

Probing ion-specific effects on aqueous acetate solutions: Ion pairing versus water structure modifications

Tristan Petit, Kathrin M. Lange, Gerrit Conrad, Kenji Yamamoto, Christoph Schwanke, Kai F. Hodeck, Marcus Dantz, Tim Brandenburg, Edlira Suljoti, Emad F. Aziz

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

The effect of monovalent cations (Li⁺, K⁺, NH₄⁺, Na⁺) on the water structure in aqueous chloride and acetate solutions was characterized by oxygen K-edge X-ray absorption spectroscopy (XAS), X-ray emission spectroscopy, and resonant inelastic X-ray scattering (RIXS) of a liquid microjet. We show ion- and counterion dependent effects on the emission spectra of the oxygen K-edge, which we attribute to modifications of the hydrogen bond network of water. For acetates, ion pairing with carboxylates was also probed selectively by XAS and RIXS. We correlate our experimental results to speciation data and to the salting-out properties of the cations.

Original language	English
Article number	034901
Journal	Structural Dynamics
Volume	1
Issue number	3
DOIs	https://doi.org/10.1063/1.4884600
State	Published - 1 May 2014
Externally published	Yes

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title = "Probing ion-specific effects on aqueous acetate solutions: Ion pairing versus water structure modifications",

abstract = "The effect of monovalent cations (Li+, K+, NH4+, Na+) on the water structure in aqueous chloride and acetate solutions was characterized by oxygen K-edge X-ray absorption spectroscopy (XAS), X-ray emission spectroscopy, and resonant inelastic X-ray scattering (RIXS) of a liquid microjet. We show ion- and counterion dependent effects on the emission spectra of the oxygen K-edge, which we attribute to modifications of the hydrogen bond network of water. For acetates, ion pairing with carboxylates was also probed selectively by XAS and RIXS. We correlate our experimental results to speciation data and to the salting-out properties of the cations.",

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doi = "10.1063/1.4884600",

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T1 - Probing ion-specific effects on aqueous acetate solutions

T2 - Ion pairing versus water structure modifications

AU - Petit, Tristan

AU - Lange, Kathrin M.

AU - Conrad, Gerrit

AU - Yamamoto, Kenji

AU - Schwanke, Christoph

AU - Hodeck, Kai F.

AU - Dantz, Marcus

AU - Brandenburg, Tim

AU - Suljoti, Edlira

AU - Aziz, Emad F.

PY - 2014/5/1

Y1 - 2014/5/1

N2 - The effect of monovalent cations (Li+, K+, NH4+, Na+) on the water structure in aqueous chloride and acetate solutions was characterized by oxygen K-edge X-ray absorption spectroscopy (XAS), X-ray emission spectroscopy, and resonant inelastic X-ray scattering (RIXS) of a liquid microjet. We show ion- and counterion dependent effects on the emission spectra of the oxygen K-edge, which we attribute to modifications of the hydrogen bond network of water. For acetates, ion pairing with carboxylates was also probed selectively by XAS and RIXS. We correlate our experimental results to speciation data and to the salting-out properties of the cations.

AB - The effect of monovalent cations (Li+, K+, NH4+, Na+) on the water structure in aqueous chloride and acetate solutions was characterized by oxygen K-edge X-ray absorption spectroscopy (XAS), X-ray emission spectroscopy, and resonant inelastic X-ray scattering (RIXS) of a liquid microjet. We show ion- and counterion dependent effects on the emission spectra of the oxygen K-edge, which we attribute to modifications of the hydrogen bond network of water. For acetates, ion pairing with carboxylates was also probed selectively by XAS and RIXS. We correlate our experimental results to speciation data and to the salting-out properties of the cations.

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DO - 10.1063/1.4884600

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VL - 1

JO - Structural Dynamics

JF - Structural Dynamics

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Probing ion-specific effects on aqueous acetate solutions: Ion pairing versus water structure modifications

Abstract

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