TY - JOUR
T1 - Imidazolium-Functionalized Carbon Nanohorns for the Conversion of Carbon Dioxide: Unprecedented Increase of Catalytic Activity after Recycling
AU - Calabrese, Carla
AU - Gruttadauria, Michelangelo
AU - Giacalone, Francesco
AU - Calabrese, Carla
AU - Carbonell, Esther
AU - Liotta, Leonarda F.
AU - Aprile, Carmela
AU - Aprile, Carmela
AU - Liotta, Leonarda Francesca
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Chemical Engineering (all)
KW - Energy (all)
KW - Environmental Chemistry
KW - Materials Science (all)
KW - carbon dioxide conversion
KW - carbon nanohorns
KW - cyclic carbonates
KW - heterogeneous catalysis
KW - imidazolium salts
KW - Chemical Engineering (all)
KW - Energy (all)
KW - Environmental Chemistry
KW - Materials Science (all)
KW - carbon dioxide conversion
KW - carbon nanohorns
KW - cyclic carbonates
KW - heterogeneous catalysis
KW - imidazolium salts
UR - http://hdl.handle.net/10447/225007
UR - http://www.interscience.wiley.com/jpages/1864-5631
M3 - Article
VL - 10
SP - 1202
EP - 1209
JO - ChemSusChem
JF - ChemSusChem
SN - 1864-5631
ER -