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Covalent organic frameworks as metal-free heterogeneous photocatalysts for organic transformations
- Zhi, Yongfeng, Li, Ziping, Feng, Xiao, Xia, Hong, Zhang, Yumin, Shi, Zhan, Mu, Ying, Liu, Xiaoming
- Journal of materials chemistry A 2017 v.5 no.44 pp. 22933-22938
- crystal structure, irradiation, oxygen, photocatalysis, photocatalysts, porosity, surface area
- Two-dimensional covalent organic frameworks (2D-COFs) are excellent candidates for photocatalytic organic transformations due to their periodic columnar π-arrays and ordered nanochannels. Here, we present a novel 2D-COF that features permanent porosity with high surface area and large pore volume, and exhibits a high crystallinity and an excellent stability. Indeed, the new 2D-COF was found to be a highly efficient, metal-free, recyclable heterogeneous photocatalyst for oxidative C–H functionalizations under visible-light irradiation using O₂ as a green oxygen source.