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Multicolor Emission from Non‐conjugated Polymers Based on a Single Switchable Boron Chromophore
Author(s) -
Wang Junwei,
Wang Nan,
Wu Gang,
Wang Suning,
Li Xiaoyu
Publication year - 2019
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.201812210
Subject(s) - chromophore , monomer , polymer , photochemistry , conjugated system , polymerization , materials science , boron , fluorescence , methacrylate , polymer chemistry , solvent , chemistry , organic chemistry , physics , quantum mechanics , composite material
Multicolor emissive and responsive materials are highly attractive owing to their potential applications in various fields, and polymers are preferred for their good processability and high stability. Herein, we report a series of new polymers based on a methacrylate monomer containing a switchable boron chromophore. In spite of their unconjugated nature, interestingly, the homopolymers from this monomer display rare multicolor fluorescence in solution that is highly dependent on the degree of polymerization (DP). With an increasing DP, the local concentration of the chromophore increases, leading to a higher propensity for switching the blue‐emitting tricoordinate boron chromophore to the red‐emitting tetracoordinate one. The homopolymers also display temperature‐ and solvent‐dependent emission color change. Furthermore, pure white‐light emission could be achieved in various solvents by precisely tuning the homopolymer molecular weight, or in films/solid state by copolymerizing the emissive boron monomer with non‐emissive monomers in an appropriate ratio.