Ferroelectric mixtures containing fluorine derivatives

Abstract

Some multicomponent ferroelectric mixtures have been prepared and characterised. Novel non-chiral and chiral non-mesogenic fluorine containing ester derivatives were mixed with chiral compounds and binary mixtures exhibiting smectic C phase. The physical and electrooptical properties such as tilt angle and switching time were also measured.

Synthesis and SmC* properties of chiral liquid crystalline terephthalates

“…By contrast, appreciable racemization [14], whereas the same reaction (S)-bis-1-methylheptyl 1,1¾ -4¾ 1² -terphenyl-1,4² dicarboxyfor the preparation of the 2-chloropropyl analogue late ( 16 ) [19] is not liquid crystalline, while achiral occurred with complete racemization, as described 4-n-hexyloxyphenyl 4-n-decyloxybenzoate ( 13 ) exhibits earlier [13 ]. In contrast, (R)-2-chloropropyl 4-hydroxyenantiotropic SmC, SmA, N and monotropic SmB benzoate ( 5b) was easily prepared by ® rst reacting phases [ 20 ]. 4-ethoxycarbonyloxybenzoyl chloride ( 6 ) with (R)-2-Compound 3b was used as representative of one-ring chloropropanol under mild conditions, and then cleaving guests in two kinds of binary mixtures (table 3).…”

“…The binary mixture M 3 had the shortest switching time. It is interesting to note that compound 16 [ 20], which is a chiral dopant inducing high polarization in a non-chiral SmC matrix [ 18], when used in the ternary mixture M 5 cancels the e ect of compound 15 (cell thickness 6 mm, clean glass surfaces).…”