A novel series of ferroelectric liquid crystals with a¯uorinated asymmetric frame were synthesized by utilizing optically active (S)-2-, (S)-3-, (S)-4-and (S)-5-¯uoroalkanols prepared from corresponding (R)-1,2-epoxyalkanes. Their mesomorphic and physical properties, such as spontaneous polarization, optic tilt angle and response time, were investigated systematically in a series of homologous compounds having the chiral centre at di erent positions on tails of various lengths. All the compounds exhibited the chiral smectic C phase in a wide range of temperatures and were found to possess a fast response time in spite of the small magnitude of the spontaneous polarization.

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New homologous ferroelectric liquid crystals were synthesized by utilizing optically active 5-fluoro-1 -alkanol. Their mesomorphic and physical properties were investigated systematically with respect to their homologous compounds having different cores. All the compounds exhibited chiral smectic C phases in a wide range of temperatures. The magnitude of spontaneous polarization, tilt angle and response time were measured. Kevwordsoptically active 5-fluoro-1