Effect of temperature on the photoalignment of azo dyes in thin films


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The temperature dependences of the induced dichroic ratios (DRs) of azo dyes after their photoalignment in thin films 80 to 200 nm thick are studied. It is found that the DR values of layers containing dyes of the benzeneazodiphenyl series fall from 6.0 to 1.6 as the temperature rises from 60 to 130°C, respectively. A reduction in induced DR as the temperature rises (from 20 to 100°C) is also observed for the thin films of the dyes of benzeneazo-5,5’-dioxodibenzothiophene group. The absence of induced DR after irradiation with polarized light at 100°C indicates there is no alignment of molecules at this temperature.

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V. Mikulich

Institute of the Chemistry of New Materials

编辑信件的主要联系方式.
Email: mikulich.vadim@gmail.com
白俄罗斯, Minsk, 220141

An. Murauski

Institute of the Chemistry of New Materials

Email: mikulich.vadim@gmail.com
白俄罗斯, Minsk, 220141

Al. Muravsky

Institute of the Chemistry of New Materials

Email: mikulich.vadim@gmail.com
白俄罗斯, Minsk, 220141

V. Agabekov

Institute of the Chemistry of New Materials

Email: mikulich.vadim@gmail.com
白俄罗斯, Minsk, 220141

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