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- Title
New features of a smectic- A-crystal- B phase transition in a homologous series of liquid crystals.
- Authors
Aver'yanov, E.
- Abstract
The components L of the Lorentz tensor and the polarizability density of molecules G in the smectic- A and crystalline- B phases have been determined for homologues of the series of alkyl- p-(4-alkoxybenzylideneamino-)cinnamates. The quantity L ( G) in both phases is a linear (quadratic) function of the orientational order parameter of molecules S, which is invariant (noninvariant) with respect to the A- B transition, which is manifested in the form of jumps δ L and δ G and enhancement of the G( S) dependence. An increase in the length of terminal molecular chains and weakening of interlayer correlation of molecules are accompanied by strengthening of the A- B transition of the first order and G( S) dependences in both phases together with an increase in δ L and δ G. Change δ G and dependence G( S) in the B phase are related to change in the conformation (flattening) of aromatic molecular cores.
- Subjects
PHASE transitions; LIQUID crystals; CONFORMATIONAL analysis; MOLECULAR conformation; LORENTZ transformations; LORENTZ invariance; ASTROPHYSICS
- Publication
JETP Letters, 2014, Vol 99, Issue 3, p158
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364014030047