抄録
In order to study the influence of carbon numbers of alkyl chains on liquid crystalline behavior and crystal structures, crystal structures have been determined for alkyl 4-[2-(perfluorooctyl)ethoxy]benzoates, which show uncommon liquid crystalline features : lower (n=1〜5) and higher members (n≥11) show monotropic smectic A phases while middle members do not. The crystal structures of middle members (n=6,7) are different from that of a lower member (n=2). In the former, the perfluorooctyl group and the alkyl chain are alternately arranged while in the latter perfluorooctyl chains aggregate. It is suggested that fluorophilic interaction has an influence on the appearance of liquid crystalline phases.
