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Updated: Mar 21, 2026

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
Published on: September 29, 2023
Aluminium salabza complexes for fixation of CO2 to organic carbonates
L Cuesta-Aluja1, J Castilla, A M Masdeu-Bultó
1Department of Physical and Inorganic Chemistry, University Rovira i Virgili, Marcel·lí Domingo, s/n. 43007 Tarragona, Spain. annamaria.masdeu@urv.cat.
Abstract:
A highly stable and easy to synthesize aluminium complex bearing a flexible N2O2-donor salabza ligand (N,N'-bis(salicylene)-2-aminobenzylamine) in combination with tetrabutylammonium bromide forms an active binary catalytic system for the cycloaddition of CO2 to epoxides (TOFs 120-3434 h(-1)) under mild conditions (10 bar, 80 °C) and low catalyst loadings (0.05-0.2 mol%). Kinetic experiments have shown that the cycloaddition of CO2 to styrene oxide catalyzed by 1/TBAB is first order in 1, TBAB, CO2 and epoxide. A reaction mechanism is proposed based on these observations. Fe(iii) and Co(iii) related complexes are less active catalysts for this reaction.
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