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Functionalized phosphonium-based ionic liquids as efficient catalysts for the synthesis of cyclic carbonate from expoxides and carbon dioxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
39992 45842 2014 6 PDF Available
Title
Functionalized phosphonium-based ionic liquids as efficient catalysts for the synthesis of cyclic carbonate from expoxides and carbon dioxide
Abstract

•Functionalized phosphonium-based ILs (FPBILs) were synthesized by a simple method.•For the first time the FPBILs were used as catalysts for cycloaddition reaction.•The FPBILs show high catalytic activity and selectivity under mild conditions.•The structure of FPBILs has an influence on catalytic activity.

A series of novel functionalized phosphonium-based ionic liquids (FPBILs) were synthesized by a simple method, and first evaluated as catalysts for the synthesis of cyclic carbonates through the cycloaddition of CO2 to epoxides in the absence of co-catalyst and solvent. The FPBILs perform well in the cycloaddition reaction, especially the carboxyl-functionalized one. Over [Ph3PC2H4COOH]Br, the yield of propylene carbonate is 97.3% (TOF = 64.9 h−1) at 130 °C and 2.5 MPa in 3 h. The synergistic effects of polarization induced by hydrogen bonding and nucleophilic attack of Br−anion account for the excellent performance. Furthermore, the FPBILs with moderate methylene chain length show superior catalytic activity. It is because they have both strong acidity and weak electrostatic interaction between phosphonium cation and halide anion. The strong acidity facilitates the ring-opening of epoxyl, and the weak electrostatic interaction enhances the nucleophilic attack capability of Br−. It is envisaged that the metal- and solvent-free process has high potential for the catalytic conversion of CO2 into value-added chemicals.

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Keywords
Carbon dioxide fixation; Cycloaddition reaction; Phosphonium-based ionic liquid; Cyclic carbonate
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Functionalized phosphonium-based ionic liquids as efficient catalysts for the synthesis of cyclic carbonate from expoxides and carbon dioxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 470, 30 January 2014, Pages 183–188
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us