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.制备各种具有手性基团的偶氮苯分子(Azo)。通过掺杂手性偶氮苯分子诱导胆甾相。紫外光和可见光照射改变偶氮分子的扭曲力，引起反式-顺式光异构化。发现反式偶氮的扭转力比顺式偶氮的扭转力大。2．通过使用诱导胆甾型液晶实现了三种类型的切换。一是选择性反思的转变。第二是手性意义的反转，第三是胆甾相和向列相之间的转换。3．还发现聚合物和诱导胆甾型液晶的复合物显示出光化学转换。此外，复合材料比不含聚合物的胆甾型材料表现出更好的记忆性能。

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。

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。

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）。