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Hydroxyl-functionalized pyrazolium ionic liquids to catalyze chemical fixation of CO2: Further benign reaction condition for the single-component catalyst
- Source :
- Journal of Molecular Liquids. 293:111479
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Lots of ionic liquids have been utilized as catalyst for the coupling reaction of carbon dioxide with epoxides, however, catalyzed conditions could not be regarded as benign, especially when no co-catalyst and/or organic solvent is involved. A series of hydroxyl-functionalized pyrazolium ionic liquids are firstly synthesized. They would efficiently catalyze the cycloaddition of carbon dioxide and propylene oxide under 110 °C and 1.0 MPa carbon dioxide initial pressure with 1 mol% catalyst during 4 h resulting in the product yield of 91.2%. The catalytic condition is greatly refined as compared with other single-component ionic liquids with simple anion. Simultaneously, the effect of reaction temperature, amount of catalyst, carbon dioxide initial pressure, and reaction time is explored along with the reusability of catalyst. For most of epoxides with terminal substituted group, HEEPzBr presents acceptable catalytic activity. The difference of HEMPzBr, HEEPzBr, and HPEPzBr is also explored by the density functional theory calculations.
- Subjects :
- Inorganic chemistry
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
Cycloaddition
Coupling reaction
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Catalysis
Ion
chemistry.chemical_compound
chemistry
Ionic liquid
Carbon dioxide
Materials Chemistry
Density functional theory
Propylene oxide
Physical and Theoretical Chemistry
0210 nano-technology
Spectroscopy
Subjects
Details
- ISSN :
- 01677322
- Volume :
- 293
- Database :
- OpenAIRE
- Journal :
- Journal of Molecular Liquids
- Accession number :
- edsair.doi...........878ccbfcfd7de3dbc40a83118d5c5b7e