Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation

Detalhes bibliográficos
Autor(a) principal: Martins, Leandro
Data de Publicação: 2006
Outros Autores: Bonagamba, Tito José, Azevedo, Eduardo R. de, Bargiela, Pascal, Cardoso, Dilson
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6492
Resumo: RESTRITO
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spelling Martins, LeandroBonagamba, Tito JoséAzevedo, Eduardo R. deBargiela, PascalCardoso, DilsonMartins, LeandroBonagamba, Tito JoséAzevedo, Eduardo R. deBargiela, PascalCardoso, Dilson2012-07-26T17:09:38Z2012-07-26T17:09:38Z20060926-860Xhttp://www.repositorio.ufba.br/ri/handle/ri/6492v.312, n.8RESTRITOSi-MCM-41 molecular sieves, which are largely used in a number of acid and redox catalyzed reactions, as reported by the literature, were used as basic catalyst for the Knoevenagel condensation. This reaction involves the condensation of carbonyl compounds with active methylene compounds to generate unsaturated products. The catalyst, which pores were occluded by the organic template, provided high activity in mild conditions, even under 10 °C. The high activity is due to the presence of siloxy anions, of high basicity, located in the pore cavity of the hexagonally ordered mesopores. Ion exchange procedures evidenced the presence of these high basic sites as a consequence of the high pH increase of the solution containing tetramethylammonium chloride, or the high H+ consumption, added to a the medium as HCl, to keep constant pH. O 1s XPS and 29Si CP/MAS NMR measurements confirmed the existence of only ≡SiO−CTA+ ionic pair, which is the basic site itself.Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2012-07-26T17:09:38Z No. of bitstreams: 1 CC.pdf: 540272 bytes, checksum: 37e4cdd731acd7ed639b57df55ffb819 (MD5)Made available in DSpace on 2012-07-26T17:09:38Z (GMT). No. of bitstreams: 1 CC.pdf: 540272 bytes, checksum: 37e4cdd731acd7ed639b57df55ffb819 (MD5) Previous issue date: 2006Applied Catalysis A: Generalhttp://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/j.apcata.2006.06.035reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBASi-MCM-41Basic catalysisKnoevenagel condensationMolecular sievesSurfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensationApplied Catalysis A: Generalinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleenginfo:eu-repo/semantics/openAccessLICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/6492/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52ORIGINALCC.pdfCC.pdfapplication/pdf540272https://repositorio.ufba.br/bitstream/ri/6492/1/CC.pdf37e4cdd731acd7ed639b57df55ffb819MD51TEXTCC.pdf.txtCC.pdf.txtExtracted texttext/plain36027https://repositorio.ufba.br/bitstream/ri/6492/3/CC.pdf.txtdbd42b26472e4a23e6228a07dbb2b138MD53ri/64922022-07-05 14:03:11.964oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:11Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
dc.title.alternative.pt_BR.fl_str_mv Applied Catalysis A: General
title Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
spellingShingle Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
Martins, Leandro
Si-MCM-41
Basic catalysis
Knoevenagel condensation
Molecular sieves
title_short Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
title_full Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
title_fullStr Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
title_full_unstemmed Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
title_sort Surfactant containing Si-MCM-41: An efficient basic catalyst for the Knoevenagel condensation
author Martins, Leandro
author_facet Martins, Leandro
Bonagamba, Tito José
Azevedo, Eduardo R. de
Bargiela, Pascal
Cardoso, Dilson
author_role author
author2 Bonagamba, Tito José
Azevedo, Eduardo R. de
Bargiela, Pascal
Cardoso, Dilson
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Martins, Leandro
Bonagamba, Tito José
Azevedo, Eduardo R. de
Bargiela, Pascal
Cardoso, Dilson
Martins, Leandro
Bonagamba, Tito José
Azevedo, Eduardo R. de
Bargiela, Pascal
Cardoso, Dilson
dc.subject.por.fl_str_mv Si-MCM-41
Basic catalysis
Knoevenagel condensation
Molecular sieves
topic Si-MCM-41
Basic catalysis
Knoevenagel condensation
Molecular sieves
description RESTRITO
publishDate 2006
dc.date.issued.fl_str_mv 2006
dc.date.accessioned.fl_str_mv 2012-07-26T17:09:38Z
dc.date.available.fl_str_mv 2012-07-26T17:09:38Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6492
dc.identifier.issn.none.fl_str_mv 0926-860X
dc.identifier.number.pt_BR.fl_str_mv v.312, n.8
identifier_str_mv 0926-860X
v.312, n.8
url http://www.repositorio.ufba.br/ri/handle/ri/6492
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Applied Catalysis A: General
publisher.none.fl_str_mv Applied Catalysis A: General
dc.source.pt_BR.fl_str_mv http://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/j.apcata.2006.06.035
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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instname_str Universidade Federal da Bahia (UFBA)
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institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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