Jung-il Jin, Hyoseok Kim, J. Shin
Dec 4, 1990
Citations
0
Influential Citations
17
Citations
Journal
Bulletin of The Korean Chemical Society
Abstract
A series of compounds consisting of 4'-oxybenzylidene-4-n-butylaniline, a mesogen, and a p-substituted phenoxyterephthaloyl structure a non-mesogen, interconnected through a central hexamethylene spacer were synthesized and their thermal behavior and liquid crystallinity were studied. p-Substituents included in this study are H, Cl, CN, and phenyl groups. The compounds having phenyl and substituents are enantiotropic and form smectic-A(SA) and nematic (N) phases. The compound with substituent is monotropic and forms only a nematic phase on heating the solid, whereas it forms nematic as well as phases on cooling the isotropic liquid. The rest compounds were found to be non-liquid crystalline. This is in great contrast to the fact that the monomesogenic model compound 4'-n-hexyloxybenzylidine-4-n-butylaniline forms and N phases enantiotropically.