Non-symmetrical bent-shaped compounds containing a chiral moiety
The synthesis and mesomorphic properties of new non-symmetrical bent-shaped compounds containing a chiral moiety are reported. These materials were built up from 3-hydroxybenzoic acid as a central unit with a chiral terminal group derived from lactic acid. A columnar phase of the B1REV
type with tilted molecules was observed in a wide temperature range down to room temperature. The ferroelectric-like character of switching with one peak in a half-period of the triangular electric field was observed and supported by texture observations and electro-optical changes. A longer
terminal group ending with a double bond makes the compounds ready for polymerisation.
Keywords: bent-shaped mesogen; columnar phase; ferroelectricity; polar switching
Document Type: Research Article
Affiliations: 1: Institute of Physics, Academy of Science of the Czech Republic, Prague, Czech Republic 2: Solid State Physics and Optics,Wigner Research Centre, Hungarian Academy of Sciences, Budapest, Hungary 3: NMR Laboratory,Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary 4: Laboratory of Dielectrics and Magnetics, Chemistry Department,Warsaw University, Warsaw, Poland
Publication date: 01 October 2012
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