PD02 コレステリック液晶螺旋構造の光制御 : キラルアゾベンゼン分子構造の影響(フォトニクス・光デバイス)

概要

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Several chiral azobenzene compounds, which have different chiral substituents, were prepared. Mixing each azobenzene compound in a host nematic liquid crystal (E44) induced a cholesteric phase. We measured the helical twisting power (HTP) of the chiral azobenzene compounds before and after ultraviolet irradiation to cause trans-cis photoisomerization of the chiral azobenzene compounds. All of the compounds were found to show decrease in the HTP by ultraviolet irradiation. The strength of HTP and the change in HTP by ultraviolet irradiation were dependent on a kind of chiral substituents, a number of chiral substituents and the basic structure of the azobenzene compounds. The effect of the phase structures of cholesteric liquid crystals will be discussed.
日本液晶学会の論文
2003-10-14