CO₂ Capture by Porous Polymeric Sorbents: From New cis-/trans-Oxovanadium(IV) Catalyst to Functional Materials

The challenge of ever-increasing greenhouse gas emissions correlates with intensive research into the development of new CO₂ sorbents. The research aimed to propose a new generation of porous polymer sorbents that contribute to decarbonization. Among all oligomers and (co)polymers, the 3-buten-2-ol oligomer showed the highest CO₂ sorption properties (0.82 mmol g^-1). The heat of adsorption of CO₂ by oligo(3-buten-2-ol) was equal to 8.51 kJ mol^-1. Polyolefins and polar oligomers were synthesized using a new, innovative, and highly active oxovanadium(IV) precatalyst. An easy, one-step method for the synthesis of cis/trans-[VO(acac)₂(3-ppy)] provides a unique coordination compound containing two molecules that are reciprocal geometric isomers with a spatial arrangement of acetylacetonate ligands (cis and trans). The complex shows very active catalytic properties in the polymerization reactions of olefins (83,400 kg_PE mol_V^-1 h^-1) and polar monomers, for example, 2-propen-1-ol (1060 kg mol_V^-1 h^-1). A physicochemical study was also conducted to determine the stability constant of the complex formation, log β₁₂₁₀ = 27.82.