Quantitative assessment of kosmotropicity of hydrated ionic liquids by nuclear magnetic resonance

Yohsuke Nikawa; Kyoko Fujita; Hiroyuki Ohno

doi:10.1039/c6cp07463d

Quantitative assessment of kosmotropicity of hydrated ionic liquids by nuclear magnetic resonance

Phys Chem Chem Phys. 2017 Mar 22;19(12):8148-8151. doi: 10.1039/c6cp07463d.

Authors

Yohsuke Nikawa¹, Kyoko Fujita², Hiroyuki Ohno²

Affiliations

¹ Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan. ohnoh@cc.tuat.ac.jp and Functional Ionic Liquid Laboratories (FILL), Graduate School of Engineering, Tokyo University of Agriculture and Technology, Japan.
² Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan. ohnoh@cc.tuat.ac.jp and Functional Ionic Liquid Laboratories (FILL), Graduate School of Engineering, Tokyo University of Agriculture and Technology, Japan and Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST), Chiyoda, Tokyo 102-0076, Japan.

PMID: 28286890
DOI: 10.1039/c6cp07463d

Abstract

Nuclear magnetic resonance studies revealed that the chemical shift of H₂O in hydrated ionic liquids varied with their component ions. The variation reflected the formation of hydrogen bonding networks between ions and water molecules. The chemical shift relative to bulk water was used to quantitatively assess the kosmotropicity.