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Abstract
New non-symmetrical bent-core mesogens with a variable flexible chain length have been synthesised. The compounds were derived from 3-hydroxybenzoic acid, which is the central unit of the molecules. The tails on both ends were connected by ester functionality, one tail contains a terminal double bond and the other is saturated. The compounds represent novel non-symmetric molecules both in their core and tails. The main features of differential scanning calorimetry, polarising optical microscopy, electro-optical and polarisation current measurements for all studied materials indicate a transition between a single tilted synclinic ferroelectric and an antiferroelectric smectic phase.
Acknowledgements
In the US side this work was partially supported by NSF grant number DMS-0456221. In the European side this work was partially supported by the Hungarian Research Grant OTKA-K-61075, the Ministry of Education, Youth and Sports of the Czech Republic OC176; furthermore, GA ASCR IAA100100911, GA ASCR IAA100100710, GA CR202/09/0047 and ASCR AVOZ10100520 are acknowledged. The synthesis and the DSC studies were carried out in the frame of the ESF-COST D35 WG 13/05 and COST-STSM-D35-2720.