Synthesis of porous aromatic framework with Friedel–Crafts alkylation reaction for CO2 separation

A novel porous aromatic framework, PAF-8, derived from tetraphenylsilane as basic building unit, was successfully synthesized via Friedel–Crafts alkylation reaction. This PAF material had high thermal stability as well as high surface area (785   m 2   g −1 ) calculated from the Brunauer–Emmett–Teller (BET) model. Meanwhile, PAF-8 possessed high performances in gas sorption and especially for CO 2 separation.