Smectic polymorphism of 4-nonyloxybenzylidene-4′-alkyloxyanilines

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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. © 2007 Elsevier B.V. All rights reserved.

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Godzwon, J., Sienkowska, M. J., & Galewski, Z. (2007). Smectic polymorphism of 4-nonyloxybenzylidene-4′-alkyloxyanilines. Journal of Molecular Structure, 844845, 259–267. https://doi.org/10.1016/j.molstruc.2007.04.029

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