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Helically π‐Stacked Conjugated Polymers Bearing Photoresponsive and Chiral Moieties in Side Chains: Reversible Photoisomerization‐Enforced Switching Between Emission and Quenching of Circularly Polarized Fluorescence
Author(s) -
Hayasaka Hiroyuki,
Miyashita Tatsuaki,
Tamura Kazuya,
Akagi Kazuo
Publication year - 2010
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200902059
Subject(s) - photoisomerization , moiety , conjugated system , materials science , photochemistry , quenching (fluorescence) , phenylene , side chain , photochromism , fluorescence , polymer , alkyl , chirality (physics) , isomerization , polymer chemistry , chemistry , stereochemistry , organic chemistry , optics , catalysis , physics , nambu–jona lasinio model , chiral symmetry breaking , quantum mechanics , composite material , quark
Novel multifunctional conjugated polymers, [poly( p ‐phenylene)s and poly(bithienylene‐phenylene)s with ( R )‐ and ( S )‐configurations], which have fluorescence, chirality, and photoresponsive properties, have been designed and synthesized. The polymers are composed of π‐conjugated main chains, where poly( p ‐phenylene) and poly(bithienylene‐phenylene) are fluorescence moieties, and the side chains of the photochromic dithienylethene moiety are linked with chiral alkyl groups. The polymer films exhibit right‐ or left‐handed circularly polarized fluorescence (CPF) and also show reversible quenching and emitting behaviors as a result of photochemical isomerization of the dithienylethene moiety upon irradiation with ultraviolet and visible light. This is the first report realizing the reversible switching of CPF using chirality and photoresponsive properties.