Bodipy-Containing Porous Microcapsules for Flow Heterogeneous Photocatalysis
Bodipy-Containing Porous Microcapsules for Flow Heterogeneous Photocatalysis
复制标题
用于流动异相光催化的含Bodipy的多孔微胶囊
DOI：
10.1021/acsami.1c10807
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发表时间：
2021
影响因子：
9.5
通讯作者：
Tao Shengyang
中科院分区：
文献类型：
--
作者：
Yang Wenbo;Feng Shi;Zhang Xue;Wang Yuchao;Li Chong;Zhang Lijing;Zhao Jianzhang;Gurzadyan Gagik G.;Tao Shengyang
Photocatalysis is a facile strategy for complex chemical transformations. Heterogeneous photocatalysis, especially in the flow system, has attracted much attention as it avoids the separation of catalysts. Herein, a kind of a Bodipy-containing porous microcapsule heterogeneous photocatalyst was rationally constructed with modulation on a multiscale. The diiodo-Bodipy with methacrylate (MA-2IBDP) was synthesized as a polymerizable photosensitizer. After immobilization in a polymer matrix, the intersystem crossing rate constant ofMA-2IBDPincreased to 2.7 × 1010s–1and its triplet excited-state lifetime prolonged to ∼1 ms. Porous structures in microcapsules were created to facilitate mass transfer. A flat plate flow reactor was constructed to fix the catalytic microcapsules and improve light utilization. With the combination of all the above benefits, the reaction rate constant (0.896 s–1) is 10 times faster than that ofMA-2IBDPin a homogeneous system for juglone synthesis. The continuous production can last for 30 h without yield decrease. The photocatalyst can also be used in aza-Henry reaction, Alder-Ene reaction, and oxidation of thiols to disulfides with conversion rates above 95%. This study provides a means for the construction of heterogeneous catalysts and the flow reaction system.
