Properties of the liquid crystals formed by certain 4-alkoxy-N-(9,10-dihydro-2-phenanthrylmethylene)anilines

Abstract

The liquid crystal transition temperatures of twelve 4-alkoxy-N-(9,10-dihydro-2-phenanthrylmethylene)-anilines are reported and discussed. The liquid crystal behaviour of the homologous series is very similar to that of the analogous compounds in which the –CHN– linkage is reversed. The form of the transition temperature plots indicates the existence of very low lateral relative to terminal cohesive forces in the mesophases of the azomethine derivatives of 9,10-dihydrophenanthrene.