12 May 2000 Dielectric characterization of different homologous compounds forming smectic B phases
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Proceedings Volume 4147, Liquid Crystals: Chemistry, Physics, and Applications; (2000) https://doi.org/10.1117/12.385687
Event: XIII International Conference on Liquid Crystals: Chemistry, Physics, and Applications, 1999, Krynica Zdroj, Poland
Abstract
The first seven members of homologous N-(4-n- hexyloxybenzylidene)-4-n-alkylanilines were synthesized, purified and characterized by calorimetric and dielectric measurements during cooling. There are phase transitions between high temperature phases (nematic, smectic A) and the solid-like smectic modifications B and G characterized by different transition entropies and different steps for the relaxation times which can be related to each other. Furthermore a change of sign of the dielectric anisotropy with increasing number of carbon atoms in the alkyl chain was detected. There is also a strong dependence of the activation energies for the reorientation about the short molecular axis on the temperature range of the nematic phase.
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Heiko Schmalfuss, Heiko Schmalfuss, Horst Kresse, Horst Kresse, } "Dielectric characterization of different homologous compounds forming smectic B phases", Proc. SPIE 4147, Liquid Crystals: Chemistry, Physics, and Applications, (12 May 2000); doi: 10.1117/12.385687; https://doi.org/10.1117/12.385687
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