Rapid Preparation of D-A Microporous Polyimides via Domino Polymerization for Photocatalytic Hydrogen Peroxide Production

The exploration of advanced polymerization strategies facilitating the introduction of delicate-tailored donor-acceptor (D-A) structure is crucial for the construction of microporous polyimide (MPI) photocatalysts. Domino polymerization allows multiple reactions to proceed in a single system, bypasses the poor solubility of multianhydride monomers in polar solvent, and avoids desolvation of oligomers, circumventing these inherent disadvantages of the conventional polycondensation. Thanks to the improved solvothermal process, the preparation of a family of MPIs embedded with different functional groups can be completed in 0.5 h. The obtained MPI containing thiadiazole group exhibits a high photocatalytic H₂O₂ production rate of 2177 μmol g^-1 h^-1 under visible light irradiation in air without sacrificial agents. The polymerization strategy demonstrates enormous potential for the synthesis of other kinds of porous organic polymers and promotes their promising applications.