Synthesis and properties of new ferroelectric liquid-crystalline compounds having a tolane rigid core and an optically active alkyl sulphinate group |
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Authors: | Armand Soldera Jean-Fran ois Nicoud Yves Galerne Antoine Skoulios Daniel Guillon |
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Affiliation: | Armand Soldera ,Jean-Franç,ois Nicoud,Yves Galerne,Antoine Skoulios,Daniel Guillon |
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Abstract: | The synthesis and the properties of new ferroelectric liquid-crystalline compounds with a tolane rigid core and an optically active alkyl sulphinate group are reported. These compounds contain two chiral centres: a sulphinate group and a branched aliphatic chain. The two pure diastereomers having opposite configurations on the sulphur have been isolated. The mesomorphic behaviour of these two compounds is different, only one exhibiting an enantiotropic chiral smectic C phase; this clearly demonstrates the role of the sulphur configuration in determining the thermotropic properties. The mesomorphic transition temperatures, the structural behaviour as a function of temperature and preliminary measurements of the spontaneous polarization are presented. |
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