A new post-synthetic route to graft amino groups in porous organic polymers for CO₂ capture.

ABSTRACT: Herein, we report the development of a post-synthetic modification approach to introduce a high loading of formyl groups onto porous aromatic framework (PAF)-5 via Friedel-Crafts alkylation followed by hydrolysis. Rigorous characterization by NMR, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy authenticated the successful integration of aldehyde moieties into PAF-5, affording PAF-5-CHO. Subsequent functionalization of PAF-5-CHO with various amines produced three amine-functionalized PAF derivatives. Notably, PAF-5-C[double bond, length as m-dash]N-EDA exhibited a 78% enhancement in carbon dioxide (CO₂) adsorption capacity, reaching 3.78 mmol g^-1 at 1 bar and 298 K relative to PAF-5-CHO. Breakthrough experiments demonstrated that P

SUBMITTER: Wang Q 

PROVIDER: S-EPMC12282537 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature