光动力疗法
免疫疗法
共价键
癌症研究
纳米技术
材料科学
化学
医学
癌症
内科学
有机化学
作者
Qinghao Zhou,Gemeng Huang,Jiale Si,Youshen Wu,Shangbin Jin,Yuanyuan Ji,Zhishen Ge
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-12-19
标识
DOI:10.1021/acsnano.4c14555
摘要
Photodynamic therapy (PDT) using oxygen-dependent type II photosensitizers is frequently limited by the hypoxic microenvironment of solid tumors. Type I photosensitizers show oxygen-independent reactive oxygen species (ROS) generation upon light irradiation but still face the challenges of aggregation-caused quenching (ACQ) and low efficiency to produce ROS. Herein, we first prepare an efficient type I photosensitizer from a perylene derivative via intramolecular donor-acceptor binding and sulfur substitution, which significantly enhance intersystem crossing between singlet and triplet states and electron transfer capability. After reaction with a type II photosensitizer, the covalent organic framework (COF) nanophotosensitizer is formed with alternated type I and II photosensitizer motifs in the same layer and staggered AB stacking between layers to avoid ACQ. The nanophotosensitizer exhibits high-efficiency generation of singlet oxygen (
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