Optical Switching between Liquid-Crystalline Assemblies with Different Structural Symmetries and Molecular Orders
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<jats:title>Abstract</jats:title> <jats:p>Optical switching between one-dimensionally ordered layered smectic C (SmC) and three-dimensionally periodic bicontinuous cubic (Cubbi) liquid-crystalline (LC) phases is a fascinating challenge because of the dramatic changes of structural symmetries and orders as well as physical properties. In this work, we have developed a new light-driven Cubbi phase system consisting of 4′-n-hexadecyloxy-3′-cyanobiphenyl-4-carboxylic acid (ACBC-16) and a structurally analogous azo compound (Azo-2). The employment of the CN side-group in the host compound brought about outstanding responsiveness under ultraviolet (UV) light in the mixtures containing 11 and 19 mol % Azo-2, leading to a UV response time of ∼5 s and excellent repeatability of on-off switching for the conversion between the two LC phases. The modification also enabled us to quantitatively analyze the mechanism of the light-induced transformation between the two LC phases. The evaluation revealed that the presence of ∼4% of bent molecules in the system under UV light destabilizes the SmC layered structure originally constructed by rod-shaped molecules, causing formation of the Cubbi phase at temperatures 10–35 K below the temperature range of the thermally-stable Cubbi phase.</jats:p>
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 91 (11), 1652-1659, 2018-11
Tokyo : Chemical Society of Japan
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詳細情報 詳細情報について
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- CRID
- 1521417755542481920
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- NII論文ID
- 130007511403
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- NII書誌ID
- AA00580132
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- ISSN
- 00092673
- 13480634
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- NDL書誌ID
- 029331721
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- 本文言語コード
- en
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- NDL 雑誌分類
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- ZP1(科学技術--化学・化学工業)
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- データソース種別
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- NDL
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