光催化
共价有机骨架
共价键
材料科学
可见光谱
亚胺
金属有机骨架
光化学
烷基化
催化作用
化学工程
化学
有机化学
光电子学
工程类
吸附
作者
Ziping Li,Yongfeng Zhi,Pengpeng Shao,Hong Xia,Guosheng Li,Xiao Feng,Xiong Chen,Zhan Shi,Xiaoming Liu
标识
DOI:10.1016/j.apcatb.2018.12.065
摘要
Visible-light active, heterogeneous, and organic photocatalysts exhibit a more sustainable and environmentally friendly alternative to classical metal-based catalysts. Two-dimensional covalent organic frameworks (2D-COFs) with permanent porosity, columnar π-arrays and excellent stability, that can become an excellent platform for heterogeneous photocatalysis of organic transformations. Here we report a predesigned imine-based COF with electron donor and acceptor structure. And new framework possesses large surface area, high crystallinity, outstanding stability and broad absorption range in the visible-light region as well as good photoelectric response characteristics. Importantly, it was found to be a highly effective heterogeneous photocatalyst for reductive dehalogenation of phenacyl bromide derivatives and α-alkylation of aldehydes under irradiation of visible-light. In addition, the COF gave good recyclability and could be reused after a simple separation manipulation. The current present still reveals a great prospect for 2D-COFs as metal-free, heterogeneous photocatalysts for organic transformations.
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