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RESEARCH PRODUCT
Imidazolium-Functionalized Carbon Nanohorns for the Conversion of Carbon Dioxide
Esther CarbonellLeonarda F. LiottaFrancesco GiacaloneCarmela AprileCarla CalabreseCarla CalabreseMichelangelo Gruttadauriasubject
Epoxy Compounds/chemistryGeneral Chemical EngineeringIodidechemistry.chemical_elementcyclic carbonatesimidazolium salts010402 general chemistryHeterogeneous catalysis01 natural sciencesSettore CHIM/04 - Chimica IndustrialeCatalysisCatalysischemistry.chemical_compoundcarbon nanohornBromideImidazoles/chemistryOrganic chemistryEnvironmental ChemistryGeneral Materials ScienceChemical Engineering (all)Recyclingchemistry.chemical_classificationNanotubes010405 organic chemistryNanotubes CarbonImidazolesSettore CHIM/06 - Chimica OrganicaCarbon Dioxide0104 chemical sciencesTurnover numbercarbon dioxide conversionGeneral Energycyclic carbonateEnergy (all)heterogeneous catalysischemistrycarbon nanohornsCarbon/chemistryCarbon dioxideEpoxy Compoundsheterogeneous catalysiMaterials Science (all)Hybrid materialCarbonCarbon Dioxide/chemistryimidazolium saltdescription
Six new hybrid materials composed of carbon nanohorns (CNHs) and highly cross-linked imidazolium salts were easily synthesized using a one-step procedure based on the radical oligomerization of bis-vinylimidazolium salts (bVImiX) in the presence of pristine CNHs. The hybrid materials were characterized and employed as the sole catalysts for the conversion of carbon dioxide into cyclic carbonate by reaction with epoxides. The solids displayed excellent turnover number and productivity. Moreover, four catalysts were investigated in recycling experiments. Two catalysts containing an octyl linker between the imidazolium units and a bromide or an iodide anion showed no loss in activity after three cycles. The other two catalysts containing a p-xylyl linker and a bromide anion and different CNHs/bVImiX ratios showed an unprecedented increase of activity after recycling.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-12-28 | ChemSusChem |