清除
活性氧
化学
聚集诱导发射
聚合物
氧气
光化学
生物物理学
荧光
有机化学
生物化学
抗氧化剂
生物
物理
量子力学
作者
Yan Zhao,Lei Xu,Zhixuan Feng,Yin Sha,Weixu Feng,Hongxia Yan
出处
期刊:Biomacromolecules
[American Chemical Society]
日期:2024-03-13
卷期号:25 (4): 2635-2644
标识
DOI:10.1021/acs.biomac.4c00193
摘要
Developing nonconjugated materials with large Stokes shifts is highly desired. In this work, three kinds of hyperbranched aggregation-induced emission (AIE) polymers with tunable n/π electronic effects were synthesized. HBPSi-CBD contains alkenyl groups in the backbone and possesses a promoted n−π* transition and red-shifted emission wavelength with a large Stokes shift of 186 nm. Experiments and theoretical simulations confirmed that the planar π electrons in the backbone are responsible for the red-shifted emission due to the strong through-space n···π interactions and restricted backbone motions. Additionally, the designed HBPSi-CBD could be utilized as an ROS scavenger after coupling with l-methionine. The HBPSi-Met exhibits remarkable ROS scavenging properties with a scavenging capacity of 77%. This work not only gains further insight into the structure–property relationship of nonconjugated hyperbranched AIE polymers but also provides a promising ROS-scavenging biomaterial for the treatment of ROS-related diseases.
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