Synthesis of Ultramicroporous Polymer Materials for CO₂ Adsorption

The synthesis of porous polymeric materials with a high proportion of micropores, including ultramicropores, from a multifunctional branched monomer by the Ni-catalyzed cyclotrimerization reaction followed by heat treatment at 500°C is presented. The textural surface properties of these polymeric materials have been studied. It has been shown that heat treatment at 500°C leads to an increase in the proportion of micropores, including ultramicropores, in the material. The specific surface area was determined, and the adsorption capacity of the obtained compounds was found to be linearly related to the volume of ultramicropores. A sample with the largest volume of ultramicropores had the highest CO₂ adsorption, being 3.12 mmol/g at 273 K and 100 kPa.