Near-Flat D–A-Typed Triphenylamine-COF toward Efficient Charge Migration and Enhanced Oxygen Activation for Boosting Photoredox Reactions

High energy level difference between electron donor (D) and electron acceptor (A) and low energy loss during charge transfer are prerequisites for the construction of efficient D–A-type covalent-organic framework (COF) photocatalysts. However, the spatial structure characteristics of the building blocks inevitably lead to the torsion of the D–A COF skeleton during the construction process and thus prevent effective charge migration. Herein, with the high-energy-level triphenylamine (TPA) as a model electron donor, the formyl positional isomers of tris(3-formylbiphenyl) amine (NDC) and tri(4-formylbiphenyl) amine (NBC) react with an acceptor 1,3,5-tris(4-aminophenyl) triazine (TTA), producing both D–A COFs for…

• NN
  National Natural Science Foundation of China

  Awards: 22173056, 22173072, 22273073
• ED
  Education Department of Shaanxi Province

  Award: 23JP042
• SP
  Shaanxi Provincial Science and Technology Department

  Award: 2022TD-32