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

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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

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Publication details

The article was received on 04 Aug 2018, accepted on 18 Oct 2018 and first published on 22 Oct 2018


Article type: Communication
DOI: 10.1039/C8SE00401C
Citation: Sustainable Energy Fuels, 2019, Advance Article
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    Efficient CO2 fixation under ambient pressure using poly(ionic liquid)-based heterogeneous catalysts

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

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