Long-Range Electrostatic Colloidal Interactions and Specific Ion Effects in Deep Eutectic Solvents
Sanchez-Fernandez, Adrian LU
; Jackson, Andrew J.
LU
; Prévost, Sylvain F.
; Doutch, James J.
and Edler, Karen J.
LU
(2021)
In Journal of the American Chemical Society
143(35).
p.14158-14168
- Abstract
While the traditional consensus dictates that high ion concentrations lead to negligible long-range electrostatic interactions, we demonstrate that electrostatic correlations prevail in deep eutectic solvents where intrinsic ion concentrations often surpass 2.5 M. Here we present an investigation of intermicellar interactions in 1:2 choline chloride:glycerol and 1:2 choline bromide:glycerol using small-angle neutron scattering. Our results show that long-range electrostatic repulsions between charged colloidal particles occur in these solvents. Interestingly, micelle morphology and electrostatic interactions are modulated by specific counterion condensation at the micelle interface despite the exceedingly high concentration of the... (More)
While the traditional consensus dictates that high ion concentrations lead to negligible long-range electrostatic interactions, we demonstrate that electrostatic correlations prevail in deep eutectic solvents where intrinsic ion concentrations often surpass 2.5 M. Here we present an investigation of intermicellar interactions in 1:2 choline chloride:glycerol and 1:2 choline bromide:glycerol using small-angle neutron scattering. Our results show that long-range electrostatic repulsions between charged colloidal particles occur in these solvents. Interestingly, micelle morphology and electrostatic interactions are modulated by specific counterion condensation at the micelle interface despite the exceedingly high concentration of the native halide from the solvent. This modulation follows the trends described by the Hofmeister series for specific ion effects. The results are rationalized in terms of predominant ion-ion correlations, which explain the reduction in the effective ionic strength of the continuum and the observed specific ion effects.
(Less)
- author
- Sanchez-Fernandez, Adrian
LU
; Jackson, Andrew J.
LU
; Prévost, Sylvain F.
; Doutch, James J.
and Edler, Karen J.
LU
- organization
- publishing date
- 2021-09
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the American Chemical Society
- volume
- 143
- issue
- 35
- pages
- 11 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85114465403
- pmid:34459188
- ISSN
- 0002-7863
- DOI
- 10.1021/jacs.1c04781
- language
- English
- LU publication?
- yes
- id
- 0f0ad058-8f62-4435-9a47-5e9b8c6cae73
- date added to LUP
- 2021-12-27 08:16:31
- date last changed
- 2024-06-17 01:59:45
@article{0f0ad058-8f62-4435-9a47-5e9b8c6cae73,
abstract = {{<p>While the traditional consensus dictates that high ion concentrations lead to negligible long-range electrostatic interactions, we demonstrate that electrostatic correlations prevail in deep eutectic solvents where intrinsic ion concentrations often surpass 2.5 M. Here we present an investigation of intermicellar interactions in 1:2 choline chloride:glycerol and 1:2 choline bromide:glycerol using small-angle neutron scattering. Our results show that long-range electrostatic repulsions between charged colloidal particles occur in these solvents. Interestingly, micelle morphology and electrostatic interactions are modulated by specific counterion condensation at the micelle interface despite the exceedingly high concentration of the native halide from the solvent. This modulation follows the trends described by the Hofmeister series for specific ion effects. The results are rationalized in terms of predominant ion-ion correlations, which explain the reduction in the effective ionic strength of the continuum and the observed specific ion effects. </p>}},
author = {{Sanchez-Fernandez, Adrian and Jackson, Andrew J. and Prévost, Sylvain F. and Doutch, James J. and Edler, Karen J.}},
issn = {{0002-7863}},
language = {{eng}},
number = {{35}},
pages = {{14158--14168}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Journal of the American Chemical Society}},
title = {{Long-Range Electrostatic Colloidal Interactions and Specific Ion Effects in Deep Eutectic Solvents}},
url = {{http://dx.doi.org/10.1021/jacs.1c04781}},
doi = {{10.1021/jacs.1c04781}},
volume = {{143}},
year = {{2021}},
}