Attenuating Imine Bond Polarization in Covalent Organic Frameworks Accelerates Charge and Proton Transport for High-Efficiency Photocatalytic Hydrogen Evolution

and an apparent quantum yield of 21.8 ± 0.80% at 450 nm, vastly outperforming its neutral and electron-withdrawing counterparts. These mechanistic insights provide a dependable blueprint for the rational design of high-performance imine-linked COF photocatalysts.