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Photo-Control of Chirality-Induced Liquid-Crystalline 3D Structures
- Source :
- Ferroelectrics. 365:39-47
- Publication Year :
- 2008
- Publisher :
- Informa UK Limited, 2008.
-
Abstract
- We investigated liquid-crystalline properties and photoresponse of a chiral azobenzene compound and found that it shows two kinds of highly-ordered liquid crystal phases. Studies on the optical textures and thermodynamic properties of the azobenzene compound suggest that the both mesophases are classified as the smectic Q (SmQ) phase which has been known as one of the chirality-induced three-dimensional (3D) liquid crystal phases. By the miscibility studies, one of the mesophases was confirmed to be T*I structure among the four structures of the SmQ phase. In a spectroscopic study of the chiral azobenzene compound in a tetrahydrofuran solution, it has been confirmed that a cis-trans photoisomerization can be induced by irradiation with ultra-violet light. Although the 3D structures are not sensitive to the applied electric field, we successfully demonstrate the “photo-switching” of these 3D structures by means of the photoisomerization.
Details
- ISSN :
- 15635112 and 00150193
- Volume :
- 365
- Database :
- OpenAIRE
- Journal :
- Ferroelectrics
- Accession number :
- edsair.doi...........96d7148710ab4f64a4ef7dee48d90d26