PBa11 光学活性な液晶基を有するポリアセチレン誘導体とその強誘電性

概要

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To develop advanced LC conjugated polymers which can be quickly responsive to electric field used as a external force, we have synthesized several new LC ployacetylene derivatives containing the optically active (S)-(+)-2-octoxyl and (S)-(-)-2-fluorooctoxyl groups at side chains. Phase transition behaviors of these polymers were examined by differential scanning calorimeter (DSC) and polarizing optical microscope (POM) and X-ray diffraction (XRD) measurements. Some polymers showed chiral smectic C phase (S_c) in wide temperature range. Mesophase behaviors of the polymers were investigated in terms of mesogenic aromatic rings and terminal asymmetic moieties. For LC polyacetylene derivatives, the S_c phase was easily formed by introducing the fluorine-containing chiral LC groups into side chains, so far as the mesogenic core including of three phenyl rings was adopted rather than that of two phenyl rings.
日本液晶学会の論文
1999-09-28