Porous inorganic–organic hybrid material (PHM) have been synthesized by click chemistry with cyclophosphazene in the framework. PHM-1 is X-ray amorphous and has a high specific surface area of 453 m² g⁻¹ with a pore size distribution of 3.7 nm. It shows a reversible CO₂ uptake of 1.83 mmol g⁻¹ at 273 K.