Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 245, Issue -, Pages 334-342Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2018.12.065
Keywords
Covalent organic frameworks; Heterogeneous catalysis; Photocatalysis; Metal-free; Visible light
Funding
- Natural Science Foundation of China [51473064, 21774040, 61435005]
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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 It-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 cc-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 photo catalysts for organic transformations.
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