Studies on photochemical control of macrostructure of polymers for automatic light and temperature modulators

自动光温调节器聚合物宏观结构的光化学调控研究

• 批准号: 12650887
• 负责人: KURIHARA Seiji
• 金额: $ 2.11万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650887/
• 关键词: optical switching; cholesteric liquid crystals; chiral azobetaene; polymer liquid cystals; composite materials; chirality; 複合材料; キラリティー; 透明; 不透明

1. Various azobenzene molecules (Azo) having chiral groups were prepared. Cholesteic phase was induced by doping the chiral azobenzene molecules. The twisting power of Azo molecules was changed by ultraviolet and visible light irradiation to cause trans-cis photoisomerization. The twisting power of trans-Azo was found to be larger than that of cis-Azo.2. Three types of switching was achieved by the use of the induced cholesteric liquid crystals. One is a shift of a selective reflection. Second is an inversion of the chiral sense, and third was a switching between the cholesteric phase and a nematic phase.3. Composite of polymer and the induced cholesteric liquid crystals was also found to / show the photochemical switchings. In addition, the composite materials showed good memory property more than the cholesteric materials without polymer.

1。制备了具有手性基团的各种偶氮分子（AZO）。通过掺杂手性偶氮苯分子来诱导胆固醇相。紫外线和可见光照射改变了偶氮分子的扭曲能力，以引起反式传播光异构化。发现跨化酶的扭曲能力比顺式 - 氮杂2的扭曲力大。通过使用诱导的胆固醇液晶实现了三种类型的开关。一种是选择性反射的转移。第二是对手性感觉的反转，第三是胆汁淤积相和列前相之间的切换。3。还发现聚合物的复合物和诱导的胆固醇液体晶体可以 /显示光化学开关。此外，复合材料比没有聚合物的胆固醇材料显示出良好的记忆特性。

项目成果

S.Kurihara, S.Nomiyama, T.Nonaka: "Photochemical control of the macrostructure of cholesteric liquid crystals by means of photoisomerization of chiral azobenzene molecules"Chemistry of Materials. 13. 1992-1997 (2001)

S.Kurihara、S.Nomiyama、T.Nonaka：“通过手性偶氮苯分子的光异构化对胆甾型液晶宏观结构进行光化学控制”材料化学。

栗原清二: "Photochemical control of the macrostructure of cholesteric liquid crystals by means of photoisomerization of chiral azobenzene molecules"Chemistry of Materials. 13・6. 1992-1997 (2001)

Seiji Kurihara：“通过手性偶氮苯分子的光异构化对胆甾型液晶的宏观结构进行光化学控制”，《材料化学》13・6（2001）。

S. Kurihara, S. Nomiyama, T. Nonaka: "Photochemical control of the macrostructure of cholesteric Liquid ctystals by means of photoisomerization of chiral azobenzene molecules"Chemistry of Materials. 13. 1992-1997 (2001)

S. Kurihara、S. Nomiyama、T. Nonaka：“通过手性偶氮苯分子的光异构化对胆甾型液晶宏观结构进行光化学控制”材料化学。