Abstract
An equimolar mixture of phosphatidylcholine and ethylene glycol was studied by pulsed proton NMR at temperatures between 100 and 430 K. Relaxation times T1, T1ρ, and T1D, and second moments, M2, were measured. The system is lamellar liquid crystalline at room temperature, but at least four phases are present within the temperature range studied. Phase transitions were confirmed by DSC. Activation barriers were estimated for methyl reorientation, choline group motion, and chain motion. Models to describe the various motions and the role of spin diffusion are discussed. The relationship of the parameters for the present system to those for the corresponding aqueous phosphatidylcholine phase is briefly considered. © 1984 American Chemical Society.
Recommended Citation
D. W. Larsen et al., "Molecular Motion And Phases In An Equimolar Phosphatidylcholine/ethylene Glycol System," Journal of Physical Chemistry, vol. 88, no. 18, pp. 4015 - 4018, American Chemical Society, Jan 1984.
The definitive version is available at https://doi.org/10.1021/j150662a031
Department(s)
Chemistry
International Standard Serial Number (ISSN)
0022-3654
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2023 American Chemical Society, All rights reserved.
Publication Date
01 Jan 1984
