Investigation of dielectric behavior of two different Schiff base ferroelectric liquid crystals
- 25 January 2021
- journal article
- research article
- Published by Taylor & Francis Ltd in Ferroelectrics
- Vol. 571 (1), 85-95
- https://doi.org/10.1080/00150193.2020.1853742
Abstract
Herein, we report on the temperature-dependent dielectric behavior of two ferroelectric liquid crystal (FLC) compounds belonging to a homologous series in the frequency range of 10 Hz–10 MHz. Precisely, the FLCs investigated in the present study are the three-ring, optically active calamitic LCs namely, (R)-4-(((4-(octan-2-yloxy)phenyl)imino)methyl)phenyl 4-(nonyl-oxy)benzoate and (R)-4-(((4-(octan-2-yloxy)phenyl)imino)methyl)phenyl 4-(undecyloxy)-benzoate, which have been, respectively, referred to as SB(R)-9 and SB(R)-11. The complex permittivity of both the LCs has been measured at different temperatures where the relaxation time and conductivity are calculated. The comparative study of these LCs is discussed in terms of changes in the dielectric parameters. The experimental results reported herein may have shed light on the physical parameters and feasibility/suitability of such three-ring calamitics in practical applications, especially in FLC displays.Keywords
This publication has 39 references indexed in Scilit:
- Synthesis and Characterization of Ferroelectric Liquid Crystalline Organosiloxanes Containing 4-(4-undecanyloxy bi-phenyl-1-carboxyloxy)phenyl (2S,3S)-2-chloro-3-methylvalerate and 4-(4-undecanyloxybenzoyloxy)biphenyl (2S,3S)-2-chloro-3-methylvalerateInternational Journal of Molecular Sciences, 2013
- Ferroelectricity in liquid crystals—materials, properties and applicationsLiquid Crystals, 2011
- Ferroelectric and Antiferroelectric Liquid CrystalsFerroelectrics, 2004
- Non Polarizer Guest–Host mode based on Dyes with Negative DichroismJapanese Journal of Applied Physics, 2003
- Spontaneous Polarization Vector Reorientation Photorefractive Effect in Dye-Doped Ferroelectric Liquid CrystalsThe Journal of Physical Chemistry B, 2002
- Electrooptical Properties of Aligned Dye-doped Polymer Dispersed Liquid Crystal FilmsJapanese Journal of Applied Physics, 1998
- Chirality in liquid crystalsJournal of Materials Chemistry, 1991
- Ferroelectric liquid crystal materials applied to guest-host type displaysFerroelectrics, 1988
- Ferroelectric liquid crystals V. Chiral alkenyloxyphenyl 4-biphenyl-1-carboxylatesLiquid Crystals, 1988
- The ‘universal’ dielectric responseNature, 1977