Cross-linked polyamine-based materials were easily prepared by reduction of the corresponding cross-linked imidazolium-based materials with sodium borohydride in hot ethanol. Overall, the synthetic procedure is based on the polymerization of a suitable bis-vinylimidazolium salt with or without a suitable support, such as silica or silica-coated magnetic nanoparticles (γ-Fe2O3@SiO2), followed by reduction. This simple approach allows the synthesis of materials based on a network of secondary and tertiary amines. Materials were characterized by13C cross-polarization magic angle spinning NMR (13C CPMAS NMR), proton spin-lattice relaxation times in the rotating frame (T1ρH) and thermogravimetric analysis (TGA). Cross-linked polyamine-based materials were used as recoverable catalyst for Knoevenagel reaction. High yields of the condensation products were obtained and up to 11 cycles were carried out.

Campisciano, V., Salvo, A.M.P., Liotta, L.F., Spinella, A., Giacalone, F., Gruttadauria, M. (2018). Cross-Linked Polyamine from Imidazolium-Based Materials: A Simple Route to Useful Catalytic Materials. EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, 2018(11), 1352-1358 [10.1002/ejoc.201800040].

Cross-Linked Polyamine from Imidazolium-Based Materials: A Simple Route to Useful Catalytic Materials

Campisciano, Vincenzo;Salvo, Anna Maria Pia;Liotta, Leonarda Francesca;Spinella, Alberto;Giacalone, Francesco
;
Gruttadauria, Michelangelo
2018-01-01

Abstract

Cross-linked polyamine-based materials were easily prepared by reduction of the corresponding cross-linked imidazolium-based materials with sodium borohydride in hot ethanol. Overall, the synthetic procedure is based on the polymerization of a suitable bis-vinylimidazolium salt with or without a suitable support, such as silica or silica-coated magnetic nanoparticles (γ-Fe2O3@SiO2), followed by reduction. This simple approach allows the synthesis of materials based on a network of secondary and tertiary amines. Materials were characterized by13C cross-polarization magic angle spinning NMR (13C CPMAS NMR), proton spin-lattice relaxation times in the rotating frame (T1ρH) and thermogravimetric analysis (TGA). Cross-linked polyamine-based materials were used as recoverable catalyst for Knoevenagel reaction. High yields of the condensation products were obtained and up to 11 cycles were carried out.
2018
Settore CHIM/06 - Chimica Organica
Campisciano, V., Salvo, A.M.P., Liotta, L.F., Spinella, A., Giacalone, F., Gruttadauria, M. (2018). Cross-Linked Polyamine from Imidazolium-Based Materials: A Simple Route to Useful Catalytic Materials. EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, 2018(11), 1352-1358 [10.1002/ejoc.201800040].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/286667
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