Intramolecular disorder and its relation to mesophase structure in lipid/water mixtures |
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Authors: | N Boden P Jackson YK Levine AJI Ward |
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Institution: | Department of Physical Chemistry, University of Leeds, Leeds LS2 9JT U.K. |
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Abstract: | NMR spin-half pair dipolar echo measurements are reported for the lamellar (dispersions and multibilayer stacks) and hexagonal phases of potassium palmitate/2H2O mixtures. In the lamellar Lβ and Lγ (gel) phases the alkyl chains are rigid and perfectly ordered, while in the lamellar Lα and hexagonal phases they are flexible and disordered. In particular, the measurements show that in the fluid lamellar Lα phase the chain is “bent” at the C9–C10 segment; but is “straight” in the hexagonal phase. |
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