Issue 7, 2023

Ionic Fe(iii)-porphyrin frameworks for the one-pot synthesis of cyclic carbonates from olefins and CO2

Abstract

In this study, the rational construction of FeIII-centered porphyrin-based bifunctional ionic porous organic polymers (Fe-IPOP1/2) for a one-step, halogen-free, cascade transformation of olefins and CO2 to cyclic carbonates as compared to the conventional two-step process involving epoxides is presented. The ionic polymers, Fe-IPOP1/2 showed selective and recyclable uptake of CO2 with an interaction energy of 32.2/39.6 kJ mol−1 signifying the stronger interaction of carbon dioxide with the frameworks. Both the polymers were found to be thermally stable up to 300 °C and exhibited promising catalytic performance in the one-step, halogen-free synthesis of cyclic carbonates under eco-friendly, cocatalyst/solvent-free, atmospheric pressure conditions. The excellent catalytic activity of Fe-IPOP1/2 for a one-pot synthesis of cyclic carbonates has been ascribed to the presence of highly exposed oxophilic FeIII sites and nucleophilic Br anions in the polymers. Notably, this one-pot synthesis strategy was extended for the transformation of various substituted olefins to their respective carbonates in good yield and selectivity. Further, Fe-IPOP1 showed good reusability with retention of catalytic activity for multiple cycles of usage.

Graphical abstract: Ionic Fe(iii)-porphyrin frameworks for the one-pot synthesis of cyclic carbonates from olefins and CO2

Supplementary files

Article information

Article type
Research Article
Submitted
05 dic. 2022
Accepted
23 feb. 2023
First published
27 feb. 2023

Inorg. Chem. Front., 2023,10, 2088-2099

Ionic Fe(III)-porphyrin frameworks for the one-pot synthesis of cyclic carbonates from olefins and CO2

R. Das, S. Kamra and C. M. Nagaraja, Inorg. Chem. Front., 2023, 10, 2088 DOI: 10.1039/D2QI02599J

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