1B09 不斉中心にフッ素を有する強誘電液晶性ポリアセチレン誘導体の合成とその性質

概要

論文の詳細を見る
Novel liquid crystalline (LC) polyacetylene derivatives were synthesized to develop advanced LC conducting polymers with quick responsibility to electric field used as an external force. In practice we tried to synthesize ferroelectric LC (FLC) conducting polymers by introducing chiroptical LC substituents consisting of fluorinated asymmetric moiety into side chains of polyacetylenes. Phase transition behaviors of these polymers were examined by differential scanning calorimeter (DSC) and polarizing optical microscope (POM). Mesophases as well as higher order structures were evaluated with X-ray diffraction measurements. Two of the polymers synthesized showed chiral smectic C (S_C^*) and chiral nematic (N^*) phases in the heating process, and N^*, S_C^* and S_X^* phases in the cooling process. Observation of the S_C^* phase allows us to expect that the polymer should exhibit the ferroelectricity subjected. The results of XRD and molecular mechanics calculation suggest that FLC si de chains of the FLC polymers are on one-side of main chain.
日本液晶学会の論文
1998-10-12