Three-Way-Switchable (Right/Left/OFF) Selective Reflection of Circularly Polarized Light on Solid Thin Films of Helical Polymer Blends

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• 作者：Dr. Yuuya Nagata ; Makoto Uno and Prof. Dr. Michinori Suginome
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：June 13, 2016
• 年：2016
• 卷：55
• 期：25
• 页码：7126-7130
• 全文大小：3359K
• ISSN：1521-3773

文摘

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.