共轭体系
单线态氧
光化学
系统间交叉
光动力疗法
聚合物
聚合
光敏剂
光催化
分解
化学
组合化学
材料科学
单重态
有机化学
激发态
氧气
催化作用
核物理学
物理
作者
Wenbo Wu,Duo Mao,Shidang Xu,Kenry Kenry,Fang Hu,Xueqi Li,Deling Kong,Bin Liu
出处
期刊:Chem
[Elsevier]
日期:2018-08-01
卷期号:4 (8): 1937-1951
被引量:228
标识
DOI:10.1016/j.chempr.2018.06.003
摘要
Effective photosensitizers are highly desirable in many applications, such as photodynamic therapy, photocatalytic organic waste decomposition, and synthetic chemistry. Herein, we demonstrate polymerization-enhanced photosensitization, in which conjugated-polymer-based photosensitizers show much higher efficiency in singlet oxygen (1O2) production than their small-molecule analogs. Based on small-molecule photosensitizers SM1–SM4 with long wavelength emission, four conjugated polymer photosensitizers, CP1–CP4, were prepared. Interestingly, the conjugated polymer photosensitizers CP1–CP4 showed 5.06-, 5.07-, 1.73-, and 3.42-fold higher 1O2 generation efficiency than SM1–SM4, respectively. The improved intersystem crossing process from the singlet excitation states to the triplet excitation states and improved light-harvesting ability are essential to the enhancement of 1O2 generation efficiency. To illustrate the advantages of conjugated polymer photosensitizers on various applications, we demonstrate the superior performance of CP1 by using photoinduced organic waste decomposition, photoinduced organic oxidation reaction, and photodynamic cancer therapy as examples.
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