New ferroelectric liquid crystal having 2-methylalkanoyl group

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Abstract
A relationship between molecular structure and physical properties of newly prepared ferroelectric liquid crystals having 2-methylalkanoyl group is investigated by observing the phase transition temperatures, the spontaneous polarization, and the bistability. Carbon chain length is proved to play an important role not only in the thermal stability of the SC phase but also in the magnitude of the spontaneous polarization in this phase. A lateral fluoro substituent is efficient at producing more stable SC* phase and reducing the occurrence of higher ordered phases. Especially the lateral fluoro substitution at the ortho position to the chiral tail favors the uniform state and contributes to the bistability.