Affordable Access

Publisher Website

Intramolecular disorder and its relation to mesophase structure in lyotropic liquid crystals

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
37
Issue
1
Identifiers
DOI: 10.1016/0009-2614(76)80170-4

Abstract

Abstract NMR SPDE measurements are reported for the lamellar (dispersions and multibilayer stacks) and hexagonal phases of sodium octanoate/octanol/D 2O mixtures. In the lamellar L β and L γ (gel) phases the octyl chains are rigid and perfectly ordered, while in the lamellar L α and hexagonal phases they are flexible and disordered. In particular, the measurements show that in the fluid lamellar L α phase, there is a marked discontinuity in the octyl chain flexibility at the C 5-C 6 segment; this behaviour is identical to that previously reported for the alkyl end-chains in smectic 4,4′-di- n-octyloxyazoxybenzene. In contrast, in the hexagonal phase, there is an effectively continuous flexibility gradient along the whole length of the octyl chain as in nematic 4,4′-di- n-octyloxyazoxybenzene. The behaviour in the lamellar phase is attributed to interference between cooperative conformational modes and localized random thermal fluctuations.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Intramolecular disorder and its relation to mesoph...

on Biochimica et Biophysica Acta Feb 06, 1976

Intramolecular disorder and its relation to mesoph...

on Biochimica et Biophysica Acta... Jan 01, 1976

Carbohydrate liquid crystals: structure–property r...

on Current Opinion in Colloid & I... Jan 01, 2002

Disorder of lipid chains as a function of their la...

on Chemistry and Physics of Lipid... Jan 01, 1975
More articles like this..