pH variation in protic and pseudo-protic ionic liquid–water solutions

Hiroshi Abe; Taichi Ohkubo; Taiki Miike

Results in Chemistry (Dec 2023)

pH variation in protic and pseudo-protic ionic liquid–water solutions

Hiroshi Abe,
Taichi Ohkubo,
Taiki Miike

Affiliations

Hiroshi Abe: Corresponding author.; Department of Materials Science and Engineering, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka 239-8686, Japan
Taichi Ohkubo: Department of Materials Science and Engineering, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka 239-8686, Japan
Taiki Miike: Department of Materials Science and Engineering, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka 239-8686, Japan

Journal volume & issue: Vol. 6
p. 101045

Abstract

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In this study, the proton behaviors of protic ionic liquid (pIL) and pseudo-protic ionic liquid (psIL)–water solutions were investigated using pH measurements. Propylammonium nitrate (PAN) as a representative pIL was characterized based on the water concentration dependence of the pH values. Above 60 mol% H2O, pH increased by increasing the water concentration. Furthermore, 1-ethylimidazolium nitrate [C2Him][NO3] as a psIL was a weakly acidic. The pH values of [C2Him][NO3]–H2O were not affected by the water content. Two different pIL and psIL provided different proton behaviors in the water-mediated circumstance.

Published in Results in Chemistry

ISSN: 2211-7156 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/results-in-chemistry/

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