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

Structural Dynamics
Tristan PetitEmad F Aziz

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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Citations

Jan 20, 2015·Nanoscale·Tristan PetitEmad F Aziz
Jan 23, 2016·Structural Dynamics·Maria EkimovaErik T J Nibbering
Sep 30, 2015·Physical Chemistry Chemical Physics : PCCP·L WeinhardtC Heske
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Alesya Ya MarukAslan Yu Tsivadse
Aug 19, 2015·The Journal of Physical Chemistry Letters·Yekkoni L JeyachandranMichael Zharnikov
Mar 31, 2016·The Journal of Physical Chemistry. B·Sultan MohammadGabriele Sadowski
Aug 13, 2015·The Journal of Physical Chemistry Letters·Tristan PetitEmad F Aziz
Mar 20, 2019·The Journal of Physical Chemistry. B·Ki Chul Park, Takehiko Tsukahara
Jul 22, 2016·The Journal of Physical Chemistry. B·Y L JeyachandranM Zharnikov
Jun 1, 2016·Chemical Reviews·Thomas FranssonAnders Nilsson
Dec 28, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Ki Chul Park, Takehiko Tsukahara
Jul 26, 2017·The Journal of Physical Chemistry Letters·Zhong YinSimone Techert

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Methods Mentioned

BETA
X-ray
neutron diffraction

Software Mentioned

Medusa

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