An NMR Study of Translational Diffusion and Structural Anisotropy in Magnetically Alignable Non-Ionic Surfactant Mesophases (Articolo in rivista)

Type
Label
  • An NMR Study of Translational Diffusion and Structural Anisotropy in Magnetically Alignable Non-Ionic Surfactant Mesophases (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/la046962r (literal)
Alternative label
  • A. Yethiraj (1); D. Capitani (2); N. Burlinson (1); E.E. Burnell (1) (2005)
    An NMR Study of Translational Diffusion and Structural Anisotropy in Magnetically Alignable Non-Ionic Surfactant Mesophases
    in Langmuir
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • A. Yethiraj (1); D. Capitani (2); N. Burlinson (1); E.E. Burnell (1) (literal)
Pagina inizio
  • 3311 (literal)
Pagina fine
  • 3321 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.acs.org/doi/abs/10.1021/la046962r (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 21 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 11 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 8 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) Chemistry Department, University of British Columbia, 2036 Main Mall, Vancouver, B.C. V6T 1Z1, Canada 2) Institute of Chemical Methodologies, CNR, Research Area of Rome, Via Salaria Km 29.300, Monterotondo Staz, Rome, Italy (literal)
Titolo
  • An NMR Study of Translational Diffusion and Structural Anisotropy in Magnetically Alignable Non-Ionic Surfactant Mesophases (literal)
Abstract
  • The diffusion of both water and surfactant components in aqueous solutions of the nonionic surfactant \"C12E6\"swhich includes hexagonal, cubic, lamellar, and micellar mesophasesshas been studied by pulsedfield- gradient NMR. Diffusion coefficients were measured in unaligned samples in all of these phases. They were also obtained in the hexagonal and lamellar phases in oriented monodomain samples that were aligned by slow cooling from the micellar phase in an 11.7 T magnet. Measured water and soap diffusion coefficients in the NMR-isotropic cubic and (high-water-content) micellar phases as well as diffusion anisotropy measurements in the magnetically aligned hexagonal phase were quantitatively consistent with the constituent structures of these phases being identical surfactant cylinders, with only the fraction of surface-associated water varying with the water-soap molar ratio. The values of the water and soap diffusion coefficients in the oriented lamellar phase suggest an increase in defects and obstructions to soap diffusion as a function of increasing water content, while those in the low-water-content micellar phase rule out the presence of inverse micelles. (literal)
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