Hydrogen bond network-stabilisation of blue phases by addition of a chiral N-(10-hydroxydecyl)succinimide derivative and alkane diols |
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| Authors: | Keiki Kishikawa Yuki Furukawa Tomohiro Watanabe Michinari Kohri Tatsuo Taniguchi Shigeo Kohmoto |
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| Affiliation: | 1. Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, Chiba, Japankishikawa@faculty.chiba-u.jp;3. Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, Chiba, Japan |
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| Abstract: | Blue phases (BPs) obtained by doping a commercially available liquid crystalline compound (4-butyl-N-(4-ethoxybenzylidene)aniline (EBBA)) with (2R,3R)-2,3-bis(4-octyloxyphenylbenzoyloxy)-N-(hydroxydecyl)succinimide (1) were highly stabilised by the addition of a small amount of alkane diols. Especially, addition of only 0.5 mol% of octane-1,8-diol increased the BP–Iso transition temperature by 10 K and widened the BP temperature range up to 35 K. A model stabilisation mechanism based on the construction of a hydrogen bond network in each disclination zone in BPs was proposed. |
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| Keywords: | Blue phase chiral dopant chiral nematic liquid crystal phase disclination hydrogen bond |
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