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

## TL;DR

Scientists developed a new catalyst to create porous polymer materials that efficiently capture CO2, helping reduce greenhouse gas emissions.

## Contribution

A novel oxovanadium(IV) catalyst was developed for synthesizing functional CO2 sorbent materials with high efficiency.

## Key findings

- Oligo(3-buten-2-ol) showed high CO2 sorption (0.82 mmol g–1) and a heat of adsorption of 8.51 kJ mol–1.
- The new oxovanadium(IV) catalyst demonstrated high activity in polymerizing olefins and polar monomers.
- The stability constant of the complex formation was determined as log β1210 = 27.82.

## Abstract

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 kgPE molV
–1 h–1) and polar monomers, for example, 2-propen-1-ol
(1060 kg molV
–1 h–1). A physicochemical study was also conducted to determine the stability
constant of the complex formation, log β1210 = 27.82.