Mesoscale ordering in binary aqueous solvents induced by ion size asymmetry
(2016) In Soft Matter 12(21). p.4778-4782- Abstract
Surprising weak assembly behavior has lately been found in binary aqueous solvents containing antagonistic salt. The underlying mechanism is still under debate, particularly the role of ion size asymmetry. Here we use small-angle X-ray scattering to study the effect of ion size asymmetry on the mesoscale ordering in a binary solvent composed of water and 2,6-dimethylpyridine with added symmetrical quaternary ammonium salt. By systematically elongating the hydrocarbon side-chain lengths, and hence developing cation-to-anion size asymmetry, we provide the first experimental evidence of a gradual build-up of the solvent's mesoscale ordering. These results are in qualitative agreement with model-independent theoretical predictions.
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https://lup.lub.lu.se/record/54aaae95-68a4-48f3-8b6d-774cacad7b3b
- author
- Witala, Monika ; Lages, Sebastian LU and Nygård, Kim
- organization
- publishing date
- 2016
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Soft Matter
- volume
- 12
- issue
- 21
- pages
- 5 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:84971601998
- pmid:27112965
- wos:000379676800011
- ISSN
- 1744-683X
- DOI
- 10.1039/c6sm00580b
- language
- English
- LU publication?
- yes
- id
- 54aaae95-68a4-48f3-8b6d-774cacad7b3b
- date added to LUP
- 2017-02-22 13:46:38
- date last changed
- 2024-01-13 15:10:46
@article{54aaae95-68a4-48f3-8b6d-774cacad7b3b,
abstract = {{<p>Surprising weak assembly behavior has lately been found in binary aqueous solvents containing antagonistic salt. The underlying mechanism is still under debate, particularly the role of ion size asymmetry. Here we use small-angle X-ray scattering to study the effect of ion size asymmetry on the mesoscale ordering in a binary solvent composed of water and 2,6-dimethylpyridine with added symmetrical quaternary ammonium salt. By systematically elongating the hydrocarbon side-chain lengths, and hence developing cation-to-anion size asymmetry, we provide the first experimental evidence of a gradual build-up of the solvent's mesoscale ordering. These results are in qualitative agreement with model-independent theoretical predictions.</p>}},
author = {{Witala, Monika and Lages, Sebastian and Nygård, Kim}},
issn = {{1744-683X}},
language = {{eng}},
number = {{21}},
pages = {{4778--4782}},
publisher = {{Royal Society of Chemistry}},
series = {{Soft Matter}},
title = {{Mesoscale ordering in binary aqueous solvents induced by ion size asymmetry}},
url = {{http://dx.doi.org/10.1039/c6sm00580b}},
doi = {{10.1039/c6sm00580b}},
volume = {{12}},
year = {{2016}},
}