We present the synthesis of a porous, organic [4+4] imine cage containing perfluorinated aromatic panels. Gas adsorption experiments show an uptake of 19.0 wt% CO₂ (4.2 mmol g⁻¹, 273 K and at 1 bar) and 1.5 wt% H₂ (7.5 mmol g⁻¹, 77 K and at 1 bar) for the specific surface area of 536 m² g⁻¹ of the crystalline material obtained directly from the reaction mixture, combined with an outstanding thermal stability, making it a very interesting porous material suitable for gas adsorption.