Polarizing microscopic and 31P NMR studies of decylammonium chloride/potassium chloride/water system. containing phosphoric acid monodecyl ester and H3PO4

Acimiş M., Alaman A.

Spectroscopy Letters, vol.28, no.7, pp.997-1005, 1995 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 7
  • Publication Date: 1995
  • Doi Number: 10.1080/00387019508009439
  • Journal Name: Spectroscopy Letters
  • Journal Indexes: Scopus
  • Page Numbers: pp.997-1005
  • Keywords: 31P NMR spectra, Phase transitions in lyotropics, polarizing microscopy
  • Ondokuz Mayıs University Affiliated: No

Abstract

The decylammonium chloride (DACl), KCl and D2O system forms two phases(Nc+Nd) in the nematic range. The Nd phase was ca. 15% by volume and exhibited extinct appearance. From conoscopic measurements it was inferred that the optical axis of the Nd phase was tilted. The lamellar phase of the DACl-KCl-D2O system as well as the lamellar phase obtained by adding phosphoric acid decylester/phosphoric acid (PDE/H3PO4) showed the following phase sequence: [figure omitted] isotropic The line shapes of 31P NMR of PDE/H3PO4 were found to be sensitive to micelle size and dynamics occuring in the lyotropic system, but they do not differentiate between different micelle shapes. © 1995, Taylor & Francis Group, LLC. All rights reserved.