Polarizing Microscopic and 31P NMR Studies of Decylammonium Chloride/Potassium Chloride/Water System. Containing Phosphoric Acid Monodecyl Ester and H3PO4 |
| |
| Authors: | Mahmut Acimişl Ayşen Alaman |
| |
| Affiliation: | 1. Abant Izzet Baysal University, Faculty of Arts and Sciences, Department of Chemistry , 14280, BOLU/TURKEY;2. Ondokuz Mayis University, Faculty of Arts and Sciences. Department of Chemistry , 55139, SAMSUN/TURKEY |
| |
| 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: Lα + Nd 35°C Hα + Nd 40°C Nc + Nd 45°C Nc 50°C 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. |
| |
| Keywords: | Phase transitions in lyotropics polarizing microscopy 31P NMR spectra. |
|
|
