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The synthesis and mesomorphic properties of some novel antiferroelectric liquid crystals.
Hird, Michael; Goodby, John W.; Toyne, Kenneth J.; Gleeson, Helen F.; Buxton, I. Peter; Seed, Alexander J.; Herbert, Mark R
Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals. 2001;365:213-220.
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Abstract
Several esters were synthesized that exhibit the antiferroelec. smectic C phase. The core structures, like virtually all antiferroelec. materials, are very similar to that of MHPOBC. Lateral fluoro substituents were used to reduce m.ps. and to study their effect on mesomorphic properties, spontaneous polarization and tilt angle. A new device format reported by Lagerwall requires antiferroelec. liq. crystals with a 45 Deg tilt angle. Novel antiferroelec. materials were prepd. with fluoro substituents in lateral positions and in a terminal chain to provide low m.ps., high antiferroelec. phase stability, high spontaneous polarization and tilt angles of up to 45 Deg. The synthetic routes to the novel materials are discussed, and the transition temps., tilt angles and spontaneous polarizations are compared to those of known materials. [on SciFinder (R)]
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