Direct Evidence of Confined Water in Room-Temperature Ionic Liquids by Complementary Use of Small-Angle X-ray and Neutron Scattering

被引：59

作者：

Abe, Hiroshi ^{[1
]}

Takekiyo, Takahiro ^{[2
]}

Shigemi, Machiko ^{[2
]}

Yoshimura, Yukihiro ^{[2
]}

Tsuge, Shu ^{[3
]}

Hanasaki, Tomonori ^{[3
]}

Ohishi, Kazuki ^{[4
]}

Takata, Shinichi ^{[5
]}

Suzuki, Jun-ichi ^{[4
]}

机构：

[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka, Kanagawa 2398686, Japan

[2] Natl Def Acad, Dept Appl Chem, Yokosuka, Kanagawa 2398686, Japan

[3] Ritsumeikan Univ, Dept Appl Chem, Kusatsu, Shiga 5258577, Japan

[4] CROSS, Res Ctr Neutron Sci & Technol, Tokai, Ibaraki 3191106, Japan

[5] Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 07期

关键词：

NANOSTRUCTURAL ORGANIZATION; MIXTURES; ATSAS-2.1; ORIGIN;

D O I：

10.1021/jz500299z

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The direct evidence of confined water ("water pocket") inside hydrophilic room-temperature ionic liquids (RTILs) was obtained by complementary use of small-angle X-ray scattering and small-angle neutron scattering (SAXS and SANS). A large contrast in X-ray and neutron scattering cross-section of deuterons was used to distinguish the water pocket from the RTIL. In addition to nanoheterogeneity of pure RTILs, the water pocket formed in the water-rich region. Both water concentration and temperature dependence of the peaks in SANS profiles confirmed the existence of the hidden water pocket. The size of the water pocket was estimated to be similar to 3 nm, and D2O aggregations were well-simulated on the basis of the observed SANS data.

引用

页码：1175 / 1180

页数：6

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