Thermal and X-Ray Diffraction Studies of Liquid Crystals Incorporating a Perfluoroalkyl Group

T. Doi Chemical Process Engineering, Faculty of Engineering, Osaka University, Suita, Osaka, 565, Japan

S. Takenaka Chemical Process Engineering, Faculty of Engineering, Osaka University, Suita, Osaka, 565, Japan

S. Kusabayashi Chemical Process Engineering, Faculty of Engineering, Osaka University, Suita, Osaka, 565, Japan

Y. Nishihata Department of Physics, Faculty of Science, Kwansei-Gakuin University, Nishinomiya, Hyogo, 661, Japan

H. Terauchi Department of Physics, Faculty of Science, Kwansei-Gakuin University, Nishinomiya, Hyogo, 661, Japan

Abstract

Thermal properties of some liquid crystals incorporating a perfluoroalkyl group have been examined. The perfluoroalkyl group tends to enhance the smectic properties. The layer spacing in the smectic A and C phases was examined by X-ray diffraction, showing that the ratio of the layer spacing to the calculated molecular length is dependent on the entirety of molecular structures rather than the length of the perfluoroalkyl chain, and is in the range between 1.0 and 1.4. Novel perfluoroalkyl 3- or 4-substituted benzenes exhibiting smectic A phase were also prepared.

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Thermal and X-Ray Diffraction Studies of Liquid Crystals Incorporating a Perfluoroalkyl Group

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Thermal and X-Ray Diffraction Studies of Liquid Crystals Incorporating a Perfluoroalkyl Group

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