Cross-Linked Polyamine from Imidazolium-Based Materials: A Simple Route to Useful Catalytic Materials
| Autor: | Campisciano, Vincenzo, Salvo, Anna Maria Pia, Liotta, Leonarda Francesca, Spinella, Alberto, Giacalone, Francesco, Gruttadauria, Michelangelo |
|---|---|
| Přispěvatelé: | Campisciano, Vincenzo, Salvo, Anna Maria Pia, Liotta, Leonarda Francesca, Spinella, Alberto, Giacalone, Francesco, Gruttadauria, Michelangelo |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | European journal of organic chemistry (2018): 1352–1358. doi:10.1002/ejoc.201800040 info:cnr-pdr/source/autori:Campisciano, Vincenzo; Salvo, Anna Maria Pia; Liotta, Leonarda Francesca; Spinella, Alberto; Giacalone, Francesco; Gruttadauria, Michelangelo/titolo:Cross-Linked Polyamine from Imidazolium-Based Materials: A Simple Route to Useful Catalytic Materials/doi:10.1002%2Fejoc.201800040/rivista:European journal of organic chemistry (Print)/anno:2018/pagina_da:1352/pagina_a:1358/intervallo_pagine:1352–1358/volume |
| DOI: | 10.1002/ejoc.201800040 |
| Popis: | 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 (T1ÏH) 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|