2014
DOI: 10.1021/jz500299z
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Direct Evidence of Confined Water in Room-Temperature Ionic Liquids by Complementary Use of Small-Angle X-ray and Neutron Scattering

Abstract: 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… Show more

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Cited by 64 publications
(58 citation statements)
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“…Another MD simulation in the water‐mediated RTIL indicated extraordinal bicontinuous formation at the water‐rich region . Recently we proved the theoretically predicted water pocket in [C 4 mim][NO 3 ]‐ x mol % D 2 O by complementary use of small‐angle X‐ray scattering (SAXS) and small‐angle neutron scattering (SANS) . At room temperature, the water pocket was formed in the water‐rich region ( x =70–90 mol % D 2 O) and the averaged size of the water pocket was estimated to be around 20 Å.…”
Section: Introductionmentioning
confidence: 77%
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“…Another MD simulation in the water‐mediated RTIL indicated extraordinal bicontinuous formation at the water‐rich region . Recently we proved the theoretically predicted water pocket in [C 4 mim][NO 3 ]‐ x mol % D 2 O by complementary use of small‐angle X‐ray scattering (SAXS) and small‐angle neutron scattering (SANS) . At room temperature, the water pocket was formed in the water‐rich region ( x =70–90 mol % D 2 O) and the averaged size of the water pocket was estimated to be around 20 Å.…”
Section: Introductionmentioning
confidence: 77%
“…Water molecules move between the DEME + cation and the BF 4 − anion, and a size‐variable water cluster with a short lifetime is activated. In time‐averaged SANS, a distinct peak of [DEME][NO 3 ]–D 2 O at the water‐rich region was not observed . With some probability, the water cluster without forming the water pocket can exceed the critical size of crystal nucleation due to non‐constrained fluctuation.…”
Section: Resultsmentioning
confidence: 99%
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