Liquid Crystalline Compounds Consisting of Two Mesogens in Twisted Parallel (1)

Abstract

Behaviors and organization of liquid crystalline compounds, N, N-bis{4-[4-(4-alkoxybenzoyloxy) benzoyloxylbenzoyl}alkylamine (1), which have an iminodicarbonyl moiety as the central junction and consist of two mesogenic units in twisted parallel, were investigated by polarized light optical microscopy, differential scanning calorimetry and single crystal- and powder X-ray diffraction. Compound 1a showed nematic phase wilh highly oriented textures, and Id showed smectic A phase in which overlapping of alkyl chains between the layers was observed. The overlapping of alkyl chains originates in the structure of the molecules which have two cores with three alkyl chains in parallel.