Slow water diffusion in micellar solutions

Szabolcs Vass, Hans Grimm, I. Bányai, Gerhard Meier, T. Gilányi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Slowly diffusing water molecules were found by quasi-elastic neutron scattering (QENS) in a sodium dodecyl sulfate (SDS) micellar solution, and both their diffusion coefficient (4.33 × 10-6 cm2̇ s-1) and mole fraction (0.057) were determined. After successfully checking the mean slowing down of solvent molecules by the gradient compensated stimulated spin-echo (GCSTE) pulse sequence NMR method, a similar effect was observed with this technique in the solvent phase of dodecyl trimethylammonium bromide (DTAB) and differing chain length (X = 12, 20, 30, and 40) ethoxylated nonyl phenol (9NX) micellar systems. Following the literature, the experimental results are qualitatively explained by assuming that, apart from ionic hydration, H-bonds may form between the solvent molecules and the O or N atoms present in the hydrophilic (head)groups of the micelle-forming monomers.

Original languageEnglish
Pages (from-to)11870-11874
Number of pages5
JournalJournal of Physical Chemistry B
Volume109
Issue number24
DOIs
Publication statusPublished - Jun 23 2005

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Molecules
Water
water
molecules
Elastic scattering
Sodium dodecyl sulfate
Micelles
Neutron scattering
sodium sulfates
Bromides
Chain length
Sodium Dodecyl Sulfate
Hydration
phenols
Phenols
hydration
bromides
micelles
echoes
elastic scattering

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Slow water diffusion in micellar solutions. / Vass, Szabolcs; Grimm, Hans; Bányai, I.; Meier, Gerhard; Gilányi, T.

In: Journal of Physical Chemistry B, Vol. 109, No. 24, 23.06.2005, p. 11870-11874.

Research output: Contribution to journalArticle

Vass, Szabolcs ; Grimm, Hans ; Bányai, I. ; Meier, Gerhard ; Gilányi, T. / Slow water diffusion in micellar solutions. In: Journal of Physical Chemistry B. 2005 ; Vol. 109, No. 24. pp. 11870-11874.
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