Dynamic properties of nano-confined water in an ionic liquid

Abe, Hiroshi*; Yamada, Takeshi*; Shibata, Kaoru

Nano-confined water (a water pocket) was spontaneously formed using an ionic liquid (IL), 1-butyl-3-methylimidazolium nitrate ([C $_{4}$ mim][NO $_{3}$ ]), in [C $_{4}$ mim][NO $_{3}$ ]-H $_{2}$ O and [C $_{4}$ mim][NO $_{3}$ ]-D $_{2}$ O mixtures. The static average size of the water pocket in [C $_{4}$ mim][NO $_{3}$ ]-80 mol% D $_{2}$ O has been estimated to be around 20, determined via small-angle neutron scattering measurements. In this study, the dynamics of the water pocket in the IL were directly examined using incoherent quasielastic neutron scattering. Using the H-D difference of a neutron incoherent scattering cross section, the extent of the diffusion of the water molecules in the water pocket was determined. The water pocket could be characterized due to the slow dynamics of the water compared with those of bulk water.

Language	:	English
Journal	:	Journal of Molecular Liquids
Volume	:	264
Number	:
Pages	:	p.54 - 57
Publication Year/Month	:	2018/08
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Paper URL	:	https://doi.org/10.1016/j.molliq.2018.05.006
DOI for research data	:
Keywords	:	incoherent quasielastic neutron scattering; Ionic Liquid; nano-confined water
Research Facility	:	J-PARC物質・生命科学実験施設
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Article of JAEA R&D Review	:
Cooperating Institute	:	National Defense Academy

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Registration No. : AA20180161
JAEA Abstracts No. : 46000652
Paper Submission No. : 20233

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