光催化
系统间交叉
光化学
光敏剂
单独一对
共轭体系
部分
共价键
三嗪
催化作用
化学
接受者
单重态
材料科学
组合化学
纳米技术
有机化学
分子
聚合物
激发态
核物理学
物理
凝聚态物理
作者
Mingjie Liu,Junnan Liu,Kai Zhou,Jingwen Chen,Qi Sun,Zongbi Bao,Qiwei Yang,Yiwen Yang,Qilong Ren,Zhiguo Zhang
标识
DOI:10.1002/advs.202100631
摘要
Abstract There is growing interest in developing triplet photosensitizers in terms of implementing photochemical strategies in synthetic chemistry. However, synthesis of stable triplet organic photosensitizers is nontrivial and often requires the use of heavy atoms. Herein, an alternative strategy is demonstrated to enhance the triplet generation efficiency by implanting lone‐pair donor–acceptor bonds in the conjugated covalent organic frameworks (COFs). This powerful method is validated using COFs that host triazine, a moiety that has been extensively investigated in photocatalysis. Spectroscopic analysis and theoretical calculations reveal substantial improvements in the photoabsorptivity and triple‐state photogeneration efficiency, consistent with catalytic tests concerning industrially relevant sulfide oxidation. These systems represent a promising addition to the rapidly increasing arsenal of synthetic photocatalytic systems.
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