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Competitive Interactions at Electrolyte/Octanol Interfaces - A Molecular Perspective

preprint
submitted on 09.01.2020 and posted on 10.01.2020 by Nitesh Kumar, Michael J. Servis, Zhu Liu, Aurora Clark

Much is understood about electrolyte liquid/liquid interfaces, yet the relationships between ion solvation, adsorption, and the instantaneous surface have not been the topic of signicant study. The thermally corrugated capillary wave characteristics of the instantaneous aqueous surface contribute to heterogeneous interfacial structural and dynamic properties. Those properties are sensitive the nature of the immiscible nonpolar solvent. In this work, we examine the role of interfacial heterogeneity upon ion behavior and further, how this is inuenced by a partially polar solvent relative to a vapor phase analog. We compare and contrast ion solvation in electrolyte/vapor and electrolyte/octanol biphasic systems, focusing upon the changes to interfacial heterogeneity in the presence of the octanol solvent and the variations of ion concentration at dierent interfacial regions. The interplay between competing forces introduced by strong octanol water interactions at the interface is examined, with a new understanding of how such competition may lead to tailored interfacial properties.

Funding

THE INTERFACIAL CHEMISTRY OF SOLVENT EXTRACTION: PREDICTIVE INSIGHT INTO MECHANISMS AND KINETIC REGIMES FOR ACTINIDE SEPARATIONS

Basic Energy Sciences

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History

Email Address of Submitting Author

nitesh.kumar@wsu.edu

Institution

Washington State University

Country

USA

ORCID For Submitting Author

0000-0003-3322-8450

Declaration of Conflict of Interest

There are no conflicts of interest to declare

Version Notes

This is the first version.

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in The Journal of Physical Chemistry C

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