Synthesis and properties of ferro- and antiferroelectric esters with a chiral centre based on (S)-(+)-3-octanol |
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Authors: | Magdalena Żurowska Marek Filipowicz Michał Czerwiński Mateusz Szala |
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Institution: | Institute of Chemistry, Military University of Technology, Warsaw, Poland |
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Abstract: | A homologous series of chiral three ring esters were synthesised and their properties were studied. The materials possess an antiferroelectric phase (SmCA*) or/and a ferroelectric phase (SmC*), which was confirmed by observations of microscopic textures using a polarising optical microscope. The phase transition temperatures and enthalpies were checked by differential scanning calorimetry. The helical pitch was measured by a spectrophotometry method. For all cases the helix is right-handed, in the antiferroelectric phase the helical pitch increases with temperature, and in the ferroelectric phase the helical pitch is short. |
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Keywords: | FLCs AFLCs synthesis phase transitions enthalpies helical pitch |
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