화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals, Vol.552, 3-9, 2012
Synthesis and Mesomorphism of Novel Liquid-Crystalline Isobutyl-p-(p'-n-Alkoxy Cinnamoyloxy) Cinnamates
A new homologous series viz. Isobutyl-p-(p'-n-alkoxy cinnamoyloxy) cinnamates consisting of 11 homologs has been synthesized with an isobutyl cinnamate end group and a further cinnamate moiety as a linking group. The methyl to butyl homologs are nonmesomorphic, and the pentyl to hexadecyl derivatives are enantiotropic nematogens without exhibition of any smectic phases. The average thermal stability for the nematic phase is 138.1 degrees C with a middle ordered melting point. The structures of the novel materials were confirmed by spectroscopic techniques. The liquid crystal phase type was determined by optical polarizing microscopy and all textures are of the threaded type. The mesomorphic behavior of the series is compared with a structurally similar homologous series.