Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions

Detalhes bibliográficos
Autor(a) principal: Costa, Fábio Gomes
Data de Publicação: 2005
Outros Autores: Braga, Elias Andrade, Brandão, Soraia Teixeira, Espeleta, Alexandre de Freitas, Rocha, Zênis Novais da, Simplício, Lílian Maria Tosta, Sales, Emerson Andrade
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/13583
Resumo: Texto completo: acesso restrito.p.221–226
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spelling Costa, Fábio GomesBraga, Elias AndradeBrandão, Soraia TeixeiraEspeleta, Alexandre de FreitasRocha, Zênis Novais daSimplício, Lílian Maria TostaSales, Emerson AndradeCosta, Fábio GomesBraga, Elias AndradeBrandão, Soraia TeixeiraEspeleta, Alexandre de FreitasRocha, Zênis Novais daSimplício, Lílian Maria TostaSales, Emerson Andrade2013-11-07T13:27:19Z20050926-860Xhttp://repositorio.ufba.br/ri/handle/ri/13583v.290 n. 1-2Texto completo: acesso restrito.p.221–226Infrared and UV–vis studies of metallocene immobilization on silica are reported here. The results have indicated changes in the Zr coordination sphere of metallocene depending on the immobilization route used. The reaction of [(Cp)2ZrCl2] with silica formed [(Cp)2ZrCl]+[SiO]− species. The same metallocene, reacting with TMA modified silica, formed monomethylated and dimethylated species by the substitution of chloro for methyl ligands, stabilized on the surface by interaction with “MAO-like” species (methylaluminoxane, MAO). These monomethylated and dimethylated cationic zirconium species are the active centers for the polymerization reaction. Different order of TMA addition in the silica modification step generated surface species of a similar nature, differing in their relative quantities. The highest amount of these active species was obtained when the support was added to the TMA solution rather than adding the TMA solution to the silica support. This was the most significant parameter affecting catalytic activity in ethylene polymerization.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-11-07T13:27:19Z No. of bitstreams: 1 Fábio Gomes Costa.pdf: 327405 bytes, checksum: 752e5f91dc961c5b2bec0e2770f9d861 (MD5)Made available in DSpace on 2013-11-07T13:27:19Z (GMT). No. of bitstreams: 1 Fábio Gomes Costa.pdf: 327405 bytes, checksum: 752e5f91dc961c5b2bec0e2770f9d861 (MD5) Previous issue date: 2005http://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/j.apcata.2005.05.034reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAInfrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactionsApplied Catalysis A: Generalinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINALFábio Gomes Costa.pdfFábio Gomes Costa.pdfapplication/pdf327405https://repositorio.ufba.br/bitstream/ri/13583/1/F%c3%a1bio%20Gomes%20Costa.pdf752e5f91dc961c5b2bec0e2770f9d861MD51LICENSElicense.txtlicense.txttext/plain1383https://repositorio.ufba.br/bitstream/ri/13583/2/license.txt05eca2f01d0b3307819d0369dab18a34MD52TEXTFábio Gomes Costa.pdf.txtFábio Gomes Costa.pdf.txtExtracted texttext/plain22807https://repositorio.ufba.br/bitstream/ri/13583/3/F%c3%a1bio%20Gomes%20Costa.pdf.txtb8d57968b059e72d0cfe114a964e4af1MD53ri/135832022-07-05 14:03:00.763oai:repositorio.ufba.br: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ório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
dc.title.alternative.pt_BR.fl_str_mv Applied Catalysis A: General
title Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
spellingShingle Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
Costa, Fábio Gomes
title_short Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
title_full Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
title_fullStr Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
title_full_unstemmed Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
title_sort Infrared and ultraviolet–visible spectroscopic studies of silica, [(Cp)2ZrCl2] and trimethylaluminum interactions
author Costa, Fábio Gomes
author_facet Costa, Fábio Gomes
Braga, Elias Andrade
Brandão, Soraia Teixeira
Espeleta, Alexandre de Freitas
Rocha, Zênis Novais da
Simplício, Lílian Maria Tosta
Sales, Emerson Andrade
author_role author
author2 Braga, Elias Andrade
Brandão, Soraia Teixeira
Espeleta, Alexandre de Freitas
Rocha, Zênis Novais da
Simplício, Lílian Maria Tosta
Sales, Emerson Andrade
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Costa, Fábio Gomes
Braga, Elias Andrade
Brandão, Soraia Teixeira
Espeleta, Alexandre de Freitas
Rocha, Zênis Novais da
Simplício, Lílian Maria Tosta
Sales, Emerson Andrade
Costa, Fábio Gomes
Braga, Elias Andrade
Brandão, Soraia Teixeira
Espeleta, Alexandre de Freitas
Rocha, Zênis Novais da
Simplício, Lílian Maria Tosta
Sales, Emerson Andrade
description Texto completo: acesso restrito.p.221–226
publishDate 2005
dc.date.issued.fl_str_mv 2005
dc.date.accessioned.fl_str_mv 2013-11-07T13:27:19Z
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://repositorio.ufba.br/ri/handle/ri/13583
dc.identifier.issn.none.fl_str_mv 0926-860X
dc.identifier.number.pt_BR.fl_str_mv v.290 n. 1-2
identifier_str_mv 0926-860X
v.290 n. 1-2
url http://repositorio.ufba.br/ri/handle/ri/13583
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.source.pt_BR.fl_str_mv http://dx.doi.org.ez10.periodicos.capes.gov.br/10.1016/j.apcata.2005.05.034
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