期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 25, 页码 7126-7130出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201602035
关键词
chirality; copolymerization; helical structures; liquid crystals; thin films
资金
- Japan Science and Technology Corporation (CREST)
- Grants-in-Aid for Scientific Research [15H00994, 16K05796, 15H05811] Funding Source: KAKEN
Two poly(quinoxaline-2,3-diyl) copolymers bearing miscibility-enhancing 8-chlorooctyloxy and (S)-2-methylbutoxy or n-butoxy side chains were synthesized. After annealing in CHCl3 vapor, a polymer-blend film of these copolymers exhibited selective reflection of right-handed circularly polarized light (CPL) in the visible region. The handedness of the CPL reflected was completely inverted upon annealing of the film in THF vapor. Annealing in n-hexane vapor resulted in the phase separation of the polymer blend, which turned the selective reflection off. This three-way-switchable reflection, that is, reflection of right-handed or left-handed CPL, together with an OFF state, could be observed visually through right- and left-handed CPL filters.
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