3C19 有機金属錯体のディスコティック液晶(61) : ホメオトロピック配向を示す光重合性フタロシアニン系銅錯体のディスコティック液晶の合成

概要

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New discotic liquid crystal with one acrylate end group(2) was synthesized. The luquid crystalline properties were characterized by polarizing optical microscopy, electronic absorption spectroscopy, differential scanning calorimetry and X-ray diffractometry. As the results, phthalocyanine(Pc) derivative(2) exhibits three kind of discotic hexagonal columnar phases(Col_hl, COl_h2, Col_h3) at the lower temperatures. On the other hand, it show a discotic tetragonal columnar phase(Col_<tet>) at the higher temperatures, in which the molecules were spontaneously homeotoropically aligned on the glass plate without any treatments for the glass surface. This result was the same as the Pc derivative(I) reported previously by Hatsusaka et.al. Subsequently the difference of structures among three hexagonal columnar phases were investigated by the X-ray diffractometry. As the results, these hexagonal columnar structures were gradually disordered as Col_h1(COl_<ho>)→COl_h2(COl_<hd>)→COl_h3(Col_<hd>).
日本液晶学会の論文
2000-10-23