4-n-alkylphenyl 4-n-alkylbicyclo (2.2.2) octane-1-carboxylates to produce new series of low melting esters with large nematicranges. In particular, thirty 4-n-alkyl-2-fluorophenyl and thirteen 4-n-alkyl-2-chlorlorophenyl 4-n-alkylbicyclo (2.2.2)octane-1-carboxylates are reported. The effect of the various lateral substituents on the clearing points and viscosities of the esters are rationalized in terms of
Stable Liquid Crystals with Large Negative Dielectric Anisotropy. Part IV
作者:Maged A. Osman、T. Huynh-Ba
DOI:10.1002/hlca.19830660617
日期:1983.9.21
Stable liquidcrystals with negativedielectricanisotropy containing the bicyclo [2.2.2]octyl group were synthesized. The incorporation of this moiety in the molecules increased the thermodynamic stability of the mesophase and lowered the smectic tendency. These new compounds can be useful in liquidcrystal mixtures for homeotropic nematic displays.