1A03 ネマチック相とスメクチック相を示す常磁性キラル有機ラジカル液晶の合成と物性(2004年日本液晶学会討論会)

概要

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All-organic paramagnetic liquid crystals are of great interest regarding the possibility of reorientation of molecules by low applied magnetic fields. In addition, introduction of chirality to paramagnetic liquid crystals may give rise to ferroelectricity and thereby the cooperative effect between the magnetic and electric anisotropy. To develop chiral paramagnetic liquid crystals, several racemic and enantiomerically enriched nitroxide mesogens have been prepared. EPR spectroscopy indicates that the g values of the racemates showing only a nematic phase decrease after crystal-nematic phase transition upon heating ; this should be ascribed to the reorientation of the LC molecules by the external magnetic field. Application of electric fields to the SmC^* phases has induced spontaneous polarization bringing about ferroelectricity.
日本液晶学会の論文
2004-09-26