Issue 4, 2019

Efficient CO2 fixation under ambient pressure using poly(ionic liquid)-based heterogeneous catalysts

Abstract

We report the use of ionic liquid based polymers for the conversion of epoxides into cyclic carbonates under ambient pressure (1.02 atm). The polymeric catalysts were prepared via thiol–ene click chemistry using trithiocyanuric acid (TTCA) and divinyl imidazolium-based ionic liquids in the presence of AIBN as a radical initiator under thermal conditions. TTCA acts as a planar C3 symmetric thiol molecule and helps in CO2 absorption due to the presence of a triazine moiety. Additionally, TTCA helps to achieve the optimum separation of catalytically active sites i.e. imidazolium bromide moieties. The resulting poly(ionic liquid) together with KI as a co-catalyst has been found to be very efficient for the conversion of a wide number of epoxide substrates into their corresponding cyclic carbonates under CO2 filled balloon conditions. The catalyst was able to retain its activity up to 6 cycles.

Graphical abstract: Efficient CO2 fixation under ambient pressure using poly(ionic liquid)-based heterogeneous catalysts

Supplementary files

Article information

Article type
Communication
Submitted
04 Aug 2018
Accepted
18 Oct 2018
First published
22 Oct 2018

Sustainable Energy Fuels, 2019,3, 935-941

Efficient CO2 fixation under ambient pressure using poly(ionic liquid)-based heterogeneous catalysts

T. Biswas and V. Mahalingam, Sustainable Energy Fuels, 2019, 3, 935 DOI: 10.1039/C8SE00401C

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