A polyhedral oligomeric silsesquioxane-based catalyst for the efficient synthesis of cyclic carbonates
A polyhedral oligomeric silsesquioxane-based catalyst for the efficient synthesis of cyclic...
Bivona, Lucia A.; Fichera, Ornella; Fusaro, Luca; Giacalone, Francesco; Buaki-Sogo, Mireia; Gruttadauria, Michelangelo; Aprile, Carmela
2015-07-21 00:00:00
Polyhedral oligomeric silsesquioxane functionalized with imidazolium chloride peripheries ( POSS-Imi ) was successfully synthesized through a novel synthesis protocol. The solid was extensively characterized via 1 H NMR, 13 C NMR and IR spectroscopy as well as combustion chemical analysis, mass spectrometry and transmission electron microscopy. Moreover, an in-depth investigation through 29 Si NMR was performed. POSS-Imi was used for the first time as a catalyst for the conversion of CO 2 and epoxides into cyclic carbonates with excellent results in terms of both yield and selectivity. The catalyst displayed improved catalytic performance with respect to unsupported 1-butyl-3-methylimidazolium chloride. The enhanced activity was ascribed to the proximity effect generated by the increased local concentration of imidazolium species surrounding the inorganic silsesquioxane core.
http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.pngCatalysis Science & TechnologyRoyal Society of Chemistryhttp://www.deepdyve.com/lp/royal-society-of-chemistry/a-polyhedral-oligomeric-silsesquioxane-based-catalyst-for-the-BWt2ouD2zU
A polyhedral oligomeric silsesquioxane-based catalyst for the efficient synthesis of cyclic carbonates
Polyhedral oligomeric silsesquioxane functionalized with imidazolium chloride peripheries ( POSS-Imi ) was successfully synthesized through a novel synthesis protocol. The solid was extensively characterized via 1 H NMR, 13 C NMR and IR spectroscopy as well as combustion chemical analysis, mass spectrometry and transmission electron microscopy. Moreover, an in-depth investigation through 29 Si NMR was performed. POSS-Imi was used for the first time as a catalyst for the conversion of CO 2 and epoxides into cyclic carbonates with excellent results in terms of both yield and selectivity. The catalyst displayed improved catalytic performance with respect to unsupported 1-butyl-3-methylimidazolium chloride. The enhanced activity was ascribed to the proximity effect generated by the increased local concentration of imidazolium species surrounding the inorganic silsesquioxane core.
Journal
Catalysis Science & Technology
– Royal Society of Chemistry
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