Open AccessProbing ion-specific effects on aqueous acetate solutions: Ion pairing versus water structure modifications
Author(s) -
Tristan Petit,
Kathrin M. Lange,
Gerrit Conrad,
Kenji Yamamoto,
Christoph Schwanke,
Kai F. Hodeck,
Marcus Dantz,
Tim Brandenburg,
Edlira Suljoti,
Emad F. Aziz
Publication year - 2014
Publication title -
structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.415
H-Index - 29
ISSN - 2329-7778
DOI - 10.1063/1.4884600
Subject(s) - x ray absorption spectroscopy , chemistry , aqueous solution , counterion , absorption spectroscopy , ion , spectroscopy , inorganic chemistry , analytical chemistry (journal) , absorption (acoustics) , k edge , materials science , organic chemistry , physics , quantum mechanics , composite material
The effectof monovalent cations (Li+, K+, NH4+,Na+)on the water structure in aqueous chloride and acetate solutions wascharacterized by oxygen K-edge X-ray absorption spectroscopy(XAS),X-ray emissionspectroscopy, 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 weattribute to modifications of the hydrogen bond network of water. For acetates, ion pairing withcarboxylates was also probed selectively by XAS and RIXS. We correlate our experimental results tospeciation data and to the salting-out properties of the cations