4-5a N-メチルスチルバゾリウムと陰イオン界面活性剤のイオン対型液晶の開発と光化学反応

概要

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Ion complexes of trans N-methylstilbazolium (t-Stz) and alkyl sulfates (C_n-OSO_3) were studied for a photoreactive liquid crystalline materials. The liquid crystalline phases were characterized by differential scanninig calorimetry, polarizing optical microscopy and X-ray diffraction analysis. Fan-shaped texture was observed for t-Stz/C_<12>-OSO_3 system at 140℃, where the X-ray diffraction showed a typical pattern for S_E phase of a=0.83nm, b=0.67nm, c=2.46nm. t-Stz/C_<16>-OSO_3 was identified as S_A phase and t-Stz/C_8-OSO_3 was plate-like crystal at the temperature range from 25℃ through 150℃. Photoirradiation of the t-Stz/C_<12>-OSO_3 crystalline phase at room temperature isomerized the t-Stz to the cis isomer, resulting in phase transition to isotropic liquid.
日本液晶学会の論文
1998-10-12