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Curcuminoid‐Based Difluoroboron Dyes as High‐Performance Photosensitizers in Long‐Wavelength (Yellow and Red) Cationic Photopolymerization
Author(s) -
Han Weixiang,
You Jian,
Li Hui,
Zhao Di,
Nie Jun,
Wang Tao
Publication year - 2019
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.201900291
Subject(s) - photopolymer , cationic polymerization , curcuminoid , photochemistry , chemistry , anthraquinone , polymerization , photosensitizer , materials science , polymer chemistry , organic chemistry , polymer , biochemistry , curcumin
Difluoroboron β‐diketonate dyes are reported to exhibit excellent photophysical properties (e.g., broad absorption and large extinction coefficients) and have the potential to act as high‐performance photosensitizers in cationic photopolymerization (CP). In this study, four curcuminoid‐based difluoroboron dyes ( BF 2 Curs ) are prepared. Their ability to initiate the CP of epoxides or vinyl ethers in combination with an iodonium salt under yellow and red LEDs is investigated. Some of the BF 2 Curs ‐based photoinitiating systems exhibit much higher efficiencies than the reported anthraquinone derivative Oil Blue N ( OBN ). The molecular structure of BF 2 Curs is found to play a critical role in the photoinitiating efficiencies of cationic polymerization.