| 摘要 |
Nematic liq. crystal compn. having a pos. dielec. anisotropy were described. there compns., which contain >= 1 p-cyanocinnamic acid-p' -n-alkoxyphenyl ester(I;p-CNC6H4: CHCO2C2H4OR1-P';R1=C4-8 alkyl) and p-cyanocinnamic acid-p'-n-alkylphenly ester(II; p-CNC6H4H4CH:CHCO2C6H4R2; R2=C3-8 alkyl) are esp. useful for torsion effect-tuype display device. Thus, a typical compn. wasprepd. by heating p-CNC6H4H4CH:CHCO2 C6H4O(CH2)5-CH3-p' 50 and p-CNC6H4(CH)3-p' 50wt% in a N2 atm. at 180≦̸C.
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