文章基本信息

标题：Properties of Water Confined in Ionic Liquids
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作者：Koji Saihara ; Yukihiro Yoshimura ; Soichi Ohta 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep10619
语种：English
出版社：Springer Nature
摘要：The varying states of water confined in the nano-domain structures of typical room temperature ionic liquids (ILs) were investigated by ¹H NMR and by measurements of self-diffusion coefficients while systematically varying the IL cations and anions. The NMR peaks for water in BF₄-based ILs were clearly split, indicating the presence of two discrete states of confined water (H₂O and HOD). Proton and/or deuterium exchange rate among the water molecules was very slowly in the water-pocket. Notably, no significant changes were observed in the chemical shifts of the ILs. Self-diffusion coefficient results showed that water molecules exhibit a similar degree of mobility, although their diffusion rate is one order of magnitude faster than that of the IL cations and anions. These findings provide information on a completely new type of confinement, that of liquid water in soft matter.