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Nuclear magnetic resonance relaxation in micelles : Deuterium relaxation at three field strengths of three positions on the alkyl chain of sodium dodecyl sulphate

Söderman, Olle LU ; Carlström, Göran LU orcid ; Olsson, Ulf LU and Wong, Tuck C. (1988) In Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases 84(12). p.4475-4486
Abstract

A 2H n.m.r. relaxation study of sodium dodecyl sulphate (SDS) in the micellar phase is presented. The surfactant is specifically deuterated in the α-, γ- and ω-positions. Relaxation data are obtained at two temperatures and at three field strengths, and show a dependence on the field strength. The data are analysed with the 'two-step' model of relaxation, and the fast correlation times as well as the order parameters for the three deuterated positions on the hydrocarbon chain are presented. The order parameters obtained are very similar in magnitude to those found in the SDS/water hexagonal phase. In particular, the order parameter is very low (ca. 0.03) for the ω-methyl deuterons. In addition, a common slow correlation time... (More)

A 2H n.m.r. relaxation study of sodium dodecyl sulphate (SDS) in the micellar phase is presented. The surfactant is specifically deuterated in the α-, γ- and ω-positions. Relaxation data are obtained at two temperatures and at three field strengths, and show a dependence on the field strength. The data are analysed with the 'two-step' model of relaxation, and the fast correlation times as well as the order parameters for the three deuterated positions on the hydrocarbon chain are presented. The order parameters obtained are very similar in magnitude to those found in the SDS/water hexagonal phase. In particular, the order parameter is very low (ca. 0.03) for the ω-methyl deuterons. In addition, a common slow correlation time is obtained from the data. The slow correlation time is discussed in terms of the micellar rotational tumbling process and surfactant lateral diffusion along the micellar surface, and a value for the diffusion coefficient of the latter process is obtained.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
volume
84
issue
12
pages
12 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:37049067902
ISSN
0300-9599
DOI
10.1039/F19888404475
language
English
LU publication?
yes
id
b2b3a6b4-bbdf-4027-8548-b1a9e527cd56
date added to LUP
2019-07-25 21:39:27
date last changed
2022-03-29 02:34:17
@article{b2b3a6b4-bbdf-4027-8548-b1a9e527cd56,
  abstract     = {{<p>A <sup>2</sup>H n.m.r. relaxation study of sodium dodecyl sulphate (SDS) in the micellar phase is presented. The surfactant is specifically deuterated in the α-, γ- and ω-positions. Relaxation data are obtained at two temperatures and at three field strengths, and show a dependence on the field strength. The data are analysed with the 'two-step' model of relaxation, and the fast correlation times as well as the order parameters for the three deuterated positions on the hydrocarbon chain are presented. The order parameters obtained are very similar in magnitude to those found in the SDS/water hexagonal phase. In particular, the order parameter is very low (ca. 0.03) for the ω-methyl deuterons. In addition, a common slow correlation time is obtained from the data. The slow correlation time is discussed in terms of the micellar rotational tumbling process and surfactant lateral diffusion along the micellar surface, and a value for the diffusion coefficient of the latter process is obtained.</p>}},
  author       = {{Söderman, Olle and Carlström, Göran and Olsson, Ulf and Wong, Tuck C.}},
  issn         = {{0300-9599}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{12}},
  pages        = {{4475--4486}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases}},
  title        = {{Nuclear magnetic resonance relaxation in micelles : Deuterium relaxation at three field strengths of three positions on the alkyl chain of sodium dodecyl sulphate}},
  url          = {{http://dx.doi.org/10.1039/F19888404475}},
  doi          = {{10.1039/F19888404475}},
  volume       = {{84}},
  year         = {{1988}},
}