Enaminoketone liquid crystals having trifluoromethyl terminal substituents

Adam Krowczynski; Jadwiga Szydlowska; Ewa Gorecka; Wieslaw Pyzuk

doi:10.1117/12.215548

2 August 1995 Enaminoketone liquid crystals having trifluoromethyl terminal substituents

Adam Krowczynski, Jadwiga Szydlowska, Ewa Gorecka, Wieslaw Pyzuk

Proceedings Volume 2372, Liquid Crystals: Materials Science and Applications; (1995) https://doi.org/10.1117/12.215548
Event: Liquid Crystals: Materials Science and Applications, 1994, Zakopane, Poland

Abstract

Two homologous series of enaminoketone mesogens terminated with F₃C/OC_nH_2n+1 (perfluoromethyl series) and F₃CO/OC_nH_2n+1 groups (perfluoromethoxyl series) were synthesized and examined by optical and DSC methods. For the perfluoromethyl series, Sm-A and Cry-B smectic phases were observed and additional tilted phases appeared for short homologues (n < 7). For the perfluoromethoxyl series, the phase sequence of Sm-A, Cry-B and tilted smectic phases exist even for long examined homoglogues (to n equals 18). The occurrence of inverted phase sequence Cry-G - Sm-F - Cry- B and the presence of new orthogonal biaxial phase has also been observed for the last series.

Citation Download Citation

Adam Krowczynski, Jadwiga Szydlowska, Ewa Gorecka, and Wieslaw Pyzuk "Enaminoketone liquid crystals having trifluoromethyl terminal substituents", Proc. SPIE 2372, Liquid Crystals: Materials Science and Applications, (2 August 1995); https://doi.org/10.1117/12.215548

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