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Crystallization‐Driven Asymmetric Helical Assembly of Conjugated Block Copolymers and the Aggregation Induced White‐light Emission and Circularly Polarized Luminescence
Author(s) -
Xu Lei,
Wang Chao,
Li YanXiang,
Xu XunHui,
Zhou Li,
Liu Na,
Wu ZongQuan
Publication year - 2020
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.202006561
Subject(s) - copolymer , supramolecular chirality , chirality (physics) , materials science , luminescence , self assembly , conjugated system , supramolecular chemistry , amphiphile , nanofiber , dispersity , crystallization , circular polarization , crystallography , polymer chemistry , nanotechnology , chemistry , optics , polymer , optoelectronics , organic chemistry , crystal structure , composite material , chiral symmetry breaking , quark , quantum mechanics , nambu–jona lasinio model , physics , microstrip
Controlling the self‐assembly morphology of π‐conjugated block copolymer is of great interesting. Herein, amphiphilic poly(3‐hexylthiophene)‐ block ‐poly(phenyl isocyanide)s (P3HT‐ b ‐PPI) copolymers composed of π‐conjugated P3HT and optically active helical PPI segments were readily prepared. Taking advantage of the crystallizable nature of P3HT and the chirality of the helical PPI segment, crystallization‐driven asymmetric self‐assembly (CDASA) of the block copolymers lead to the formation of single‐handed helical nanofibers with controlled length, narrow dispersity, and well‐defined helicity. During the self‐assembly process, the chirality of helical PPI was transferred to the supramolecular assemblies, giving the helical assemblies large optical activity. The single‐handed helical assemblies of the block copolymers exhibited interesting white‐light emission and circularly polarized luminescence (CPL). The handedness and dissymmetric factor of the induced CPL can be finely tuned through the variation on the helicity and length of the helical nanofibers.