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-, 65.40.gd, 64.70.pp |