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Synthesis, Self‐assembly, and Fluorescence Application of Bottlebrush Polyfluorene‐ g ‐Polycaprolactone with Conjugated Backbone and Crystalline Brushes
Author(s) -
Zhou Mi,
He Zejian,
Chen Yulong,
Zhu Liangliang,
Li Li,
Li Jie
Publication year - 2021
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.202000544
Subject(s) - polyfluorene , polycaprolactone , materials science , copolymer , conjugated system , cationic polymerization , polymer chemistry , side chain , fluorescence , polymer , self assembly , polymerization , suzuki reaction , fluorene , chemical engineering , photochemistry , organic chemistry , chemistry , nanotechnology , alkyl , composite material , physics , engineering , aryl , quantum mechanics
A series of bottlebrush copolymers with conjugated backbone and crystalline branch chains, polyfluorene‐ g ‐polycaprolactone (PF‐ g ‐PCL), are synthesized by combining Suzuki cross‐coupling polymerization and cationic ring‐opening polymerization. The PF‐ g ‐PCLs are prepared to self‐assembled in solution and thin film. Due to the J‐type aggregation of the polyfluorene main chains, the self‐assembly spherical micelles have been observed. Meanwhile, in film, they exhibited self‐assembly ringed spherulites because of the PF microregions in the bottlebrush copolymer. As a result of the interruption of PCL side chains, the aggregation tendency of PF main chains is weakened. And both the polymer solution and solid can overcome the aggregation‐caused quenching to provide more pronounced fluorescence. Especially, owing to the good processability of the PF‐ g ‐PCL, as a fluorescent ink for different substrates, they can easily be prepared as high‐brightness fluorescent films that are invisible under ambient light.