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Reducing the Exciton Binding Energy of Donor–Acceptor‐Based Conjugated Polymers to Promote Charge‐Induced Reactions
Author(s) -
Lan ZhiAn,
Zhang Guigang,
Chen Xiong,
Zhang Yongfan,
Zhang Kai A. I.,
Wang Xinchen
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.201904904
Subject(s) - exciton , conjugated system , acceptor , binding energy , materials science , photochemistry , polymer , charge carrier , electron donor , electron acceptor , charge (physics) , photocatalysis , chemical physics , electron , chemistry , optoelectronics , atomic physics , catalysis , physics , organic chemistry , condensed matter physics , quantum mechanics , composite material
Exciton binding energy has been regarded as a crucial parameter for mediating charge separation in polymeric photocatalysts. Minimizing the exciton binding energy of the polymers can increase the yield of charge‐carrier generation and thus improve the photocatalytic activities, but the realization of this approach remains a great challenge. Herein, a series of linear donor–acceptor conjugated polymers has been developed to minimize the exciton binding energy by modulating the charge‐transfer pathway. The results reveal that the reduced energy loss of the charge‐transfer state can facilitate the electron transfer from donor to acceptor, and thus, more electrons are ready for subsequent reduction reactions. The optimized polymer, FSO‐FS, exhibits a remarkable photochemical performance under visible light irradiation.