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Order Parameters of β-Substituted Anthraquinone Dyes I: 1-Amino-4-Hydroxyanthraquinone Derivatives |
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| Authors: | Shuji Imazeki Hitoshi Ono Masaharu Kaneko Akio Mukoh |
| Institution: | 1. Advanced Research Laboratory, Hitachi, Ltd. , Kokubunji, Tokyo, 185, Japan;2. Imaging Materials Laboratory, Research Center, Mitsubishi Chemical Industries Ltd. , 1000 Kamoshida, Midoriku, Yokohama, Kanagawa, 227, Japan;3. Hitachi Research Laboratory, Hitachi, Ltd. , 4026 Kuji-cho, Hitachi, Ibaraki, 319-12, Japan |
| Abstract: | A study is presented of the optical order parameters and spectroscopic properties of I-amino-4-hydroxyanthraquinone derivatives containing various substituents in the 2-position in a nematic liquid crystalline mixture composed of cyanophenylcyclohexane derivatives. The results are discussed in terms of the effects of the dye structure on the order parameters. By introducing a-SCH2-group into the 2-position, magenta dyes have been obtained which show high order parameters and solubilities. In addition, preliminary data on the solubility and photostability of the dyes are reported. |
| Keywords: | layered tantalate photocatalyst pillared structure |