Determination of the Molecular Arrangement in Liquid Crystals. A New Method of Determining the Molecular Arrangement in Liquid Crystals by the Use of the Polarization of the Fluorescence

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概要

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• The molecular order in the liquid crystal states of <I>p</I>-<I>n</I>-octyloxybenzoic acid (OOBA) has been measured by means of a new method utilizing the polarization of the fluorescence. The polarized components of the fluorescence observed for the isotropic liquid state are independent of the rotation angle; this indicates that no molecular order exists in the liquid state. The polarized components of the fluorescence observed for the nematic state show that the molecular order of the aligned nematic state can be represented by a partially uniaxial orientation. The results observed for the nematic phase are also quantitatively discussed by the use of the uniaxial prolate ellipsoidal orientation pattern. On the other hand, the smectic state of OOBA is not affected by the surface action, and the observed patterns of the polarization of the fluorescence have very little angular dependence, in contrast with those for the nematic state. Furthermore, the molecular orientation for the crystal state of OOBA is briefly described.

• 公益社団法人 日本化学会の論文

著者

• Takase Akira

  National Industrial Research Institute, Kyushu

関連論文

• Determination of the Molecular Arrangement in Liquid Crystals. A New Method of Determining the Molecular Arrangement in Liquid Crystals by the Use of the Polarization of the Fluorescence

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