Azomesogens with 1,2,4-trisubstituted benzene moiety

[摘要] New mesogenic homologous series having an azo central linkage was synthesized by fixing a rigid 4-methyl phenyl azo group to resorcinol moiety. The terminal and lateral phenolic â€�?�OH groups were esterified, one by one, with 4-ð‘�??-alkoxybenzoyl and acetyl group, respectively. All the twelve homologues synthesized exhibit mesomorphism. The methoxy to ð‘�??-decyloxy and ð‘�??-hexadecyloxy derivatives exhibit monotropic nematic mesophase whereas, ð‘�??-dodecyloxy and ð‘�??-tetradecyloxy derivatives exhibit enantiotropic nematic mesophase. The mesogenic properties of the present series was compared with those of other structurally related mesogenic series.

[学科分类] 材料工程

[关键词] 1;2;4-Trisubstituted benzene;lateral acetyloxy group;nematic mesophase.