The state of water in non-ionic surfactant solutions and lyotropic phases : Oxygen-17 magnetic relaxation study
Carlström, Göran LU
and Halle, Bertil
LU
(1989)
In Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
85(5).
p.1049-1063
- Abstract
Water 17O longitudinal and transverse relaxation rates have been measured in aqueous solutions and mesophases of the non-ionic alkyl oligo(ethylene oxide) surfactants C12En (n = 4, 5, 8) over wide ranges of temperature and concentration. In addition, two reference systems have been investigated: high molecular weight poly(ethylene oxide) and the dimer 1,2-dimethoxy ethane. The relaxation data are consistent with the following picture of the state of water in the headgroup shell of C12En aggregates. The shell is compact, containing less than 5 and possibly as little as 2-3 water molecules per EO group. The shell exhibits substantial structural integrity; its water content is... (More)
Water 17O longitudinal and transverse relaxation rates have been measured in aqueous solutions and mesophases of the non-ionic alkyl oligo(ethylene oxide) surfactants C12En (n = 4, 5, 8) over wide ranges of temperature and concentration. In addition, two reference systems have been investigated: high molecular weight poly(ethylene oxide) and the dimer 1,2-dimethoxy ethane. The relaxation data are consistent with the following picture of the state of water in the headgroup shell of C12En aggregates. The shell is compact, containing less than 5 and possibly as little as 2-3 water molecules per EO group. The shell exhibits substantial structural integrity; its water content is essentially invariant with respect to changes in concentration. The headgroup shell is highly dynamic, the rate of water rotation in the shell being reduced by at most a factor of 5 (at room temperature) as compared to bulk water.
(Less)
- author
- Carlström, Göran
LU
and Halle, Bertil
LU
- organization
- publishing date
- 1989-12-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- volume
- 85
- issue
- 5
- pages
- 15 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:37049086886
- ISSN
- 0300-9599
- DOI
- 10.1039/F19898501049
- language
- English
- LU publication?
- yes
- id
- d3f71a5f-e622-4346-8c13-96a09bb845d0
- date added to LUP
- 2019-07-25 21:39:00
- date last changed
- 2022-03-29 02:34:18
@article{d3f71a5f-e622-4346-8c13-96a09bb845d0,
abstract = {{<p>Water <sup>17</sup>O longitudinal and transverse relaxation rates have been measured in aqueous solutions and mesophases of the non-ionic alkyl oligo(ethylene oxide) surfactants C<sub>12</sub>E<sub>n</sub> (n = 4, 5, 8) over wide ranges of temperature and concentration. In addition, two reference systems have been investigated: high molecular weight poly(ethylene oxide) and the dimer 1,2-dimethoxy ethane. The relaxation data are consistent with the following picture of the state of water in the headgroup shell of C<sub>12</sub>E<sub>n</sub> aggregates. The shell is compact, containing less than 5 and possibly as little as 2-3 water molecules per EO group. The shell exhibits substantial structural integrity; its water content is essentially invariant with respect to changes in concentration. The headgroup shell is highly dynamic, the rate of water rotation in the shell being reduced by at most a factor of 5 (at room temperature) as compared to bulk water.</p>}},
author = {{Carlström, Göran and Halle, Bertil}},
issn = {{0300-9599}},
language = {{eng}},
month = {{12}},
number = {{5}},
pages = {{1049--1063}},
publisher = {{Royal Society of Chemistry}},
series = {{Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases}},
title = {{The state of water in non-ionic surfactant solutions and lyotropic phases : Oxygen-17 magnetic relaxation study}},
url = {{http://dx.doi.org/10.1039/F19898501049}},
doi = {{10.1039/F19898501049}},
volume = {{85}},
year = {{1989}},
}