Liquid Crystalline Polymorphism of 4-Alkyloxybenzylidene-4'-Alkyloxyanilines and Entropic Effects, of Their Phase Transitions
J. Godzwon, M.J. Sienkowska and Z. Galewski
Faculty of Chemistry, University of Wrocław, 14, Joliot-Curie, 50-383 Wrocław, Poland
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Received: 3 06 2007;
This paper summarizes liquid-crystalline polymorphism of the asymmetrical 4-alkyloxybenzylidene-4'-alkyloxyanilines. In this group, containing 121 compounds, 6 types of mesophases were detected: nematic, smectic A, smectic C, smectic B, smectic I, and smectic G. Influence of both alkyl chain length on the type of mesophases and entropic effects of phase transitions are discussed.
DOI: 10.12693/APhysPolA.113.1145
PACS numbers: 64.70.M-,, 64.70.pp