Fluorescence stopped-flow study of the interaction of alkylpyridinium salts and pyrene-substituted fatty acids with lecithin vesicles
✍ Scribed by Mats Almgren; Shanti Swarup
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 482 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0009-3084
No coin nor oath required. For personal study only.
✦ Synopsis
The migration of alkylpyridinium surfactants and pyrene-substituted fatty acids between vesicles has been studied. The results are in accord with the assumption of diffusion-controUed processes. Changes in relaxation time with charge type, degree of ionization, pH, and alkyl chaha length of the migrating species are investigated and discussed.
The presence of a slower relaxation type, apparently due to a transmembrane transport was established in the case of the pyridinium surfactants, but could not be found for pyrenesubstituted fatty acids. Fluorescence-quenching studies indicate that these are present at both vesicle interfaces.