Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1411810 | Journal of Molecular Structure | 2007 | 9 Pages |
Abstract
This paper describes liquid-crystalline polymorphism of the homologous series of 4-nonyloxybenzylidene-4′-alkyloxyanilines. Based on the polarization microscopy (POM, TOA) and the calorimetric (DSC) measurements the following mesophases were detected: nematic, smectic A, smectic C, smectic B, smectic I and smectic G. The presence of these mesophases was confirmed by the miscibility method, using: 4-heptyloxybenzilidene-4′-pentylaniline, 4-hexyl-4′-decyloxyazobenzene and 4-nonyloxybenzilidene-4′-butylaniline as mesophase references. Influence of the alkyl chain length on the type of mesophases and entropic effects of phase transition are discussed.
Related Topics
Physical Sciences and Engineering
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Organic Chemistry
Authors
Joanna Godzwon, Monika J. Sienkowska, Zbigniew Galewski,