Quinacridone based 2D covalent organic frameworks as efficient photocatalysts for aerobic oxidative Povarov reaction

Quinacridone (QA) derivatives, one of cost-effective dyes with intriguing optical activity, have been extensively investigated in many fields such as organic light-emitting diodes, organic solar cells, and photocatalysis. Herein, a new QA-monomer (QA-PCHO) with a zigzag configuration was synthesized via N-arylation of benzene halide and quinacridone. The new monomer could enrich eventual structural diversity of the corresponding covalent organic frameworks (COFs). And based on the precursor, we developed two new QA-based 2D imine COFs with large pore size (> 4.7 nm) which exhibited superior photocatalytic activity toward Povarov reaction with broad substrate scopes and excellent functional group compatibility.