摘要:
Novel liquid crystal compounds having a higher clearing point and a superior stability are provided, which are trans-4-alkyloxymethyl-1-(4'-substituted biphenylyl-4)cyclohexanes expressed by the general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group of 1 to 8 cabon atoms and n represents 0 or 1.
摘要:
Compounds useful as lower viscosity liquid-crystalline components of which liquid-crystalline compositions are partly composed are provided, which compounds areliquid-crystalline compounds expressed by the general formula ##STR1## wherein ##STR2## and R.sub.1 and R.sub.2 each represent an alkyl group of 1 to 8 carbon atoms, orliquid-crystalline compounds expressed by the general formula ##STR3## wherein R.sub.1 and R.sub.2 each represent an alkyl group of 1 to 8 carbon atoms.
摘要:
Novel compounds, 4-(trans-4'-alkylcyclohexyl)benzoic acid 4"'-cyano-4"-biphenylyl esters expressed by the general formula ##STR1## wherein R represents an alkyl group having 1 to 10 carbon atoms, and liquid crystal compositions comprising at least one of the esters are provided.Liquid crystal compositions containing the compounds have practical superior characteristic properties and also good stability.
摘要:
New liquid crystal (l. c.) compounds having a positive dielectric anisotropy, 4"-(.beta.-alkyloxyethyl)-4-cyanobiphenyls and 4'-(.beta.-alkyloxyethyl)-4-cyanoterphenyls expressed by the general formula ##STR1## wherein R represents an alkyl group of 1.about.9C and n is 2 or 3; a process for preparing the same; and l.c. compositions containing at least one of the same, are provided. When the compounds are added to a l.c. having a nearly zero or negative anisotropy, a l.c. composition having a positive dielectric anisotropy can be obtained. The compounds have a greater optical anisotropy and a superior compatibility with other l.c. compounds.
摘要:
Liquid crystal materials for liquid crystal display, having a large negative dielectric anisotropy and maintaining a liquid crystal state at a broad temperature range including room temperature are provided. These materials contain novel compounds expressed by the general formula (I) ##STR1## wherein X represents ##STR2## Y represents ##STR3## R.sup.1 and R.sup.3 each represent an alkyl group or an alkyloxy group of 1-10 carbon atoms;R.sup.2 and R.sup.4 each represent an alkyl group of 1-10 carbon atoms; butcompounds wherein ##STR4## are excluded.