Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/14950
DC Field | Value | Language |
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dc.contributor.author | Ribeiro, Sonia M. | - |
dc.contributor.author | Serra, Arménio. C. | - |
dc.contributor.author | Gonsalves, A. M. d’A. Rocha | - |
dc.date.accessioned | 2011-04-11T09:24:26Z | - |
dc.date.available | 2011-04-11T09:24:26Z | - |
dc.date.issued | 2010 | - |
dc.identifier.isbn | 10.1016/j.apcata.2011.03.054 | - |
dc.identifier.issn | 0926-860X | - |
dc.identifier.uri | https://hdl.handle.net/10316/14950 | - |
dc.description.abstract | Primary amine groups were attached to a silica surface by using α,ω-diamines derivatives and (3-glycidyloxypropyl)-trimethoxysilane activation. The same activation was used to graft polyethylenimine, which also contains secondary and tertiary amine groups. These silica aminated structures were tested as heterogeneous catalysts in nitroaldol condensation with nitromethane, the derivative with the polyethylenimine moiety being the more active catalyst. This catalyst also showed efficiency in the Knoevenagel condensation of benzaldehydes with ethyl cyanoacetate under very mild reaction conditions and showed much the same efficiency when used in consecutive reaction runs. A reaction mechanism with participation of the several amine groups of the catalysts is discussed. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier | por |
dc.rights | openAccess | por |
dc.subject | Polyethylenimine | por |
dc.subject | Silica | por |
dc.subject | Heterogeneous catalysts | por |
dc.subject | Knoevenagel condensation | por |
dc.title | Silica grafted polyethylenimine as heterogeneous catalyst for condensation reactions | por |
dc.type | article | por |
degois.publication.title | Applied Catalysis A: General | por |
dc.relation.publisherversion | http://www.sciencedirect.com/science/journal/0926860X | por |
dc.peerreviewed | Yes | por |
dc.identifier.doi | 10.1016/j.apcata.2011.03.054 | - |
item.openairetype | article | - |
item.languageiso639-1 | en | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | Com Texto completo | - |
crisitem.author.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.author.researchunit | CQC - Coimbra Chemistry Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0001-8664-2757 | - |
crisitem.author.orcid | 0000-0001-9987-7301 | - |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
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Silica grafted polyethylenimine.pdf | 378.05 kB | Adobe PDF | View/Open |
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