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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. and Edler, Karen J. LU orcid (2017) In Angewandte Chemie - International Edition 56(33). p.9782-9785
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 % H2O) because of solvophobic sequestration of water into nanostructured domains around cholinium cations. At 51 wt %/83 mol % H2O, this segregation becomes unfavorable, and the DES structure is disrupted; instead, water–water and DES–water interactions dominate. At and above this hydration... (More)

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 % H2O) because of solvophobic sequestration of water into nanostructured domains around cholinium cations. At 51 wt %/83 mol % H2O, 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.

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author
; and
publishing date
type
Contribution to journal
publication status
published
keywords
deep eutectic solvents, ionic liquids, nanostructures, neutron diffraction, sustainable chemistry
in
Angewandte Chemie - International Edition
volume
56
issue
33
pages
4 pages
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:28480595
  • scopus:85026746254
ISSN
1433-7851
DOI
10.1002/anie.201702486
language
English
LU publication?
no
additional info
Publisher Copyright: © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
id
8afaa1d5-9b67-474f-b142-7943a4190705
date added to LUP
2023-01-18 09:14:48
date last changed
2024-04-18 13:00:24
@article{8afaa1d5-9b67-474f-b142-7943a4190705,
  abstract     = {{<p>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 % H<sub>2</sub>O) because of solvophobic sequestration of water into nanostructured domains around cholinium cations. At 51 wt %/83 mol % H<sub>2</sub>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.</p>}},
  author       = {{Hammond, Oliver S. and Bowron, Daniel T. and Edler, Karen J.}},
  issn         = {{1433-7851}},
  keywords     = {{deep eutectic solvents; ionic liquids; nanostructures; neutron diffraction; sustainable chemistry}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{33}},
  pages        = {{9782--9785}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Angewandte Chemie - International Edition}},
  title        = {{The Effect of Water upon Deep Eutectic Solvent Nanostructure : An Unusual Transition from Ionic Mixture to Aqueous Solution}},
  url          = {{http://dx.doi.org/10.1002/anie.201702486}},
  doi          = {{10.1002/anie.201702486}},
  volume       = {{56}},
  year         = {{2017}},
}