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Three‐Way‐Switchable ( Right / Left / OFF ) Selective Reflection of Circularly Polarized Light on Solid Thin Films of Helical Polymer Blends
Author(s) -
Nagata Yuuya,
Uno Makoto,
Suginome Michinori
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201602035
Subject(s) - annealing (glass) , materials science , polymer , miscibility , reflection (computer programming) , copolymer , solid state , attenuated total reflection , crystallography , optics , polymer chemistry , chemistry , infrared spectroscopy , organic chemistry , physics , composite material , computer science , programming language
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 CHCl 3 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.