We report the preparation of new ferroelectric liquid crystals, 4-(2-methylalkanoyl)phenyl 4'-alkyloxybiphenyl-4-carboxylates, and the measurements of their physical properties. The dependence of the magnitude of the spontaneous polarization on the alkyl chain length is observed. 4-(2-Methyloctanoyl)phenyl 4'-octyloxybiphenyl-4-carboxylate shows extremely large spontaneous polarization, 293 nC/cm2 (at 62°C) and 403 nC/cm2 (at 39°C).
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Yoshizawa et al. (1989) studied this question.
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