Abstract
The nanostructure of a series of choline chloride/urea/water deep eutectic solvent mixtures was characterized across a wide hydration range by neutron total scattering and empirical potential structure refinement (EPSR). As the structure is significantly altered, even at low hydration levels, reporting the DES water content is important. However, the DES nanostructure is retained to a remarkably high level of water (ca. 42 wt % H2 O) because of solvophobic sequestration of water into nanostructured domains around cholinium cations. At 51 wt %/83 mol % H2 O, this segregation becomes unfavorable, and the DES structure is disrupted; instead, water-water and DES-water interactions dominate. At and above this hydration level, the DES-water mixture is best described as an aqueous solution of DES components.
| Original language | English |
|---|---|
| Pages (from-to) | 9782-9785 |
| Number of pages | 4 |
| Journal | Angewandte Chemie-International Edition |
| Volume | 56 |
| Issue number | 33 |
| Early online date | 29 May 2017 |
| DOIs | |
| Publication status | Published - 7 Aug 2017 |
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The Effect of Water upon Deep Eutectic Solvent Nanostructure : An Unusual Transition from Ionic Mixture to Aqueous Solution. / Hammond, Oliver S; Bowron, Daniel T; Edler, Karen J.
In: Angewandte Chemie-International Edition, Vol. 56, No. 33, 07.08.2017, p. 9782-9785.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Effect of Water upon Deep Eutectic Solvent Nanostructure
T2 - An Unusual Transition from Ionic Mixture to Aqueous Solution
AU - Hammond, Oliver S
AU - Bowron, Daniel T
AU - Edler, Karen J
N1 - © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2017/8/7
Y1 - 2017/8/7
N2 - The nanostructure of a series of choline chloride/urea/water deep eutectic solvent mixtures was characterized across a wide hydration range by neutron total scattering and empirical potential structure refinement (EPSR). As the structure is significantly altered, even at low hydration levels, reporting the DES water content is important. However, the DES nanostructure is retained to a remarkably high level of water (ca. 42 wt % H2 O) because of solvophobic sequestration of water into nanostructured domains around cholinium cations. At 51 wt %/83 mol % H2 O, this segregation becomes unfavorable, and the DES structure is disrupted; instead, water-water and DES-water interactions dominate. At and above this hydration level, the DES-water mixture is best described as an aqueous solution of DES components.
AB - The nanostructure of a series of choline chloride/urea/water deep eutectic solvent mixtures was characterized across a wide hydration range by neutron total scattering and empirical potential structure refinement (EPSR). As the structure is significantly altered, even at low hydration levels, reporting the DES water content is important. However, the DES nanostructure is retained to a remarkably high level of water (ca. 42 wt % H2 O) because of solvophobic sequestration of water into nanostructured domains around cholinium cations. At 51 wt %/83 mol % H2 O, this segregation becomes unfavorable, and the DES structure is disrupted; instead, water-water and DES-water interactions dominate. At and above this hydration level, the DES-water mixture is best described as an aqueous solution of DES components.
U2 - 10.1002/anie.201702486
DO - 10.1002/anie.201702486
M3 - Article
VL - 56
SP - 9782
EP - 9785
JO - Angewandte Chemie-International Edition
JF - Angewandte Chemie-International Edition
SN - 1433-7851
IS - 33
ER -