Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix

Detalhes bibliográficos
Autor(a) principal: Costa, F.
Data de Publicação: 2004
Outros Autores: Fonseca, A. Maurício C., Silva, Carlos J. R., Neves, Isabel C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/5723
Resumo: The complex trans-[FMo(NNCHCHCHCH2CH3)(Ph2PCH2CH2PPh2)2][BPh4], was dispersed in a hybrid matrix synthesized by a sol-gel process. The host matrix of the so-called ureasil is a network of silica to which oligopolyoxyethylene chains [POE, (OCH2CH2)n] are grafted by means of urea cross-links. The free complex and sol-gel materials were characterized by thermal analysis (DSC), surface analysis (XPS) and spectroscopic methods (FT-IR and UV/Vis). The data gathered indicates that the molybdenum(IV) complex is immobilized in the host matrix, and it exhibits structural properties different from those of the free form. These differences could arise either from distortions caused by steric effects imposed by the structure of hybrid matrix or by interactions with the matrix. These materials shows potential applications in heterogeneous catalysis in mild conditions.
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spelling Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrixMolydenum (IV) complexDiazoalceneSol-gelComplex immobilizationHost-guestmolybdenum(IV) complexScience & TechnologyThe complex trans-[FMo(NNCHCHCHCH2CH3)(Ph2PCH2CH2PPh2)2][BPh4], was dispersed in a hybrid matrix synthesized by a sol-gel process. The host matrix of the so-called ureasil is a network of silica to which oligopolyoxyethylene chains [POE, (OCH2CH2)n] are grafted by means of urea cross-links. The free complex and sol-gel materials were characterized by thermal analysis (DSC), surface analysis (XPS) and spectroscopic methods (FT-IR and UV/Vis). The data gathered indicates that the molybdenum(IV) complex is immobilized in the host matrix, and it exhibits structural properties different from those of the free form. These differences could arise either from distortions caused by steric effects imposed by the structure of hybrid matrix or by interactions with the matrix. These materials shows potential applications in heterogeneous catalysis in mild conditions.KluwerUniversidade do MinhoCosta, F.Fonseca, A. Maurício C.Silva, Carlos J. R.Neves, Isabel C.2004-122004-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/5723eng"Journal of sol-gel science and technology". ISSN 0928-0707. 32:1-3 (Dec. 2004) 353-356.0928-070710.1007/s10971-004-5816-2www.springerlink.cominfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:27:11Zoai:repositorium.sdum.uminho.pt:1822/5723Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:21:43.419230Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
title Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
spellingShingle Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
Costa, F.
Molydenum (IV) complex
Diazoalcene
Sol-gel
Complex immobilization
Host-guest
molybdenum(IV) complex
Science & Technology
title_short Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
title_full Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
title_fullStr Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
title_full_unstemmed Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
title_sort Effect of concentration of the diazoalcene molybdenum complex immobilized in ureasil matrix
author Costa, F.
author_facet Costa, F.
Fonseca, A. Maurício C.
Silva, Carlos J. R.
Neves, Isabel C.
author_role author
author2 Fonseca, A. Maurício C.
Silva, Carlos J. R.
Neves, Isabel C.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Costa, F.
Fonseca, A. Maurício C.
Silva, Carlos J. R.
Neves, Isabel C.
dc.subject.por.fl_str_mv Molydenum (IV) complex
Diazoalcene
Sol-gel
Complex immobilization
Host-guest
molybdenum(IV) complex
Science & Technology
topic Molydenum (IV) complex
Diazoalcene
Sol-gel
Complex immobilization
Host-guest
molybdenum(IV) complex
Science & Technology
description The complex trans-[FMo(NNCHCHCHCH2CH3)(Ph2PCH2CH2PPh2)2][BPh4], was dispersed in a hybrid matrix synthesized by a sol-gel process. The host matrix of the so-called ureasil is a network of silica to which oligopolyoxyethylene chains [POE, (OCH2CH2)n] are grafted by means of urea cross-links. The free complex and sol-gel materials were characterized by thermal analysis (DSC), surface analysis (XPS) and spectroscopic methods (FT-IR and UV/Vis). The data gathered indicates that the molybdenum(IV) complex is immobilized in the host matrix, and it exhibits structural properties different from those of the free form. These differences could arise either from distortions caused by steric effects imposed by the structure of hybrid matrix or by interactions with the matrix. These materials shows potential applications in heterogeneous catalysis in mild conditions.
publishDate 2004
dc.date.none.fl_str_mv 2004-12
2004-12-01T00:00:00Z
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://hdl.handle.net/1822/5723
url http://hdl.handle.net/1822/5723
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv "Journal of sol-gel science and technology". ISSN 0928-0707. 32:1-3 (Dec. 2004) 353-356.
0928-0707
10.1007/s10971-004-5816-2
www.springerlink.com
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Kluwer
publisher.none.fl_str_mv Kluwer
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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