Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity

Detalhes bibliográficos
Autor(a) principal: Pirouzmand,Mahtab
Data de Publicação: 2013
Outros Autores: Amini,Mostafa M., Safari,Nasser, Hamoule,Touba
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013001100019
Resumo: Cobalt tetrasulfophthalocyanine (CoPcS) was chemically anchored to amine-modified MCM-41 and MCM-48 surface. These mesoporous silica were prepared by hydrothermal procedure. Physical mixtures of CoPc in MCM-41 and in MCM-48 were also prepared for comparison purposes. The four prepared catalysts, 10 wt.% CoPcS/NH2-MCM-41, 10 wt.% CoPcS/NH2-MCM-48, 10 wt.% CoPc/MCM-41 and 10 wt.% CoPc/MCM-48, were characterized by X-ray diffractometry (XRD), diffuse reflectance UV-Vis spectroscopy and BET specific surface analysis. The catalytic activity of the immobilized catalysts was tested in the aerobic epoxidation of cyclohexene. CoPcS/NH2-MCM-41 and CoPcS/NH2-MCM-48 showed relatively high epoxide selectivity but low conversion of cyclohexene compared to CoPc/MCM-41 and CoPc/MCM-48. No leaching of metallophthalocyanine from the catalysts immobilized by chemical bonding into the reaction medium was observed and these catalysts could be reused four times.
id SBQ-2_a0f87b6b487f0efd6fc259ae7b559e03
oai_identifier_str oai:scielo:S0103-50532013001100019
network_acronym_str SBQ-2
network_name_str Journal of the Brazilian Chemical Society (Online)
repository_id_str
spelling Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activityMCM-48MCM-41cobalt tetrasulfophthalocyanineimmobilizationepoxidation of cyclohexeneCobalt tetrasulfophthalocyanine (CoPcS) was chemically anchored to amine-modified MCM-41 and MCM-48 surface. These mesoporous silica were prepared by hydrothermal procedure. Physical mixtures of CoPc in MCM-41 and in MCM-48 were also prepared for comparison purposes. The four prepared catalysts, 10 wt.% CoPcS/NH2-MCM-41, 10 wt.% CoPcS/NH2-MCM-48, 10 wt.% CoPc/MCM-41 and 10 wt.% CoPc/MCM-48, were characterized by X-ray diffractometry (XRD), diffuse reflectance UV-Vis spectroscopy and BET specific surface analysis. The catalytic activity of the immobilized catalysts was tested in the aerobic epoxidation of cyclohexene. CoPcS/NH2-MCM-41 and CoPcS/NH2-MCM-48 showed relatively high epoxide selectivity but low conversion of cyclohexene compared to CoPc/MCM-41 and CoPc/MCM-48. No leaching of metallophthalocyanine from the catalysts immobilized by chemical bonding into the reaction medium was observed and these catalysts could be reused four times.Sociedade Brasileira de Química2013-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013001100019Journal of the Brazilian Chemical Society v.24 n.11 2013reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.5935/0103-5053.20130233info:eu-repo/semantics/openAccessPirouzmand,MahtabAmini,Mostafa M.Safari,NasserHamoule,Toubaeng2013-11-19T00:00:00Zoai:scielo:S0103-50532013001100019Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2013-11-19T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
title Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
spellingShingle Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
Pirouzmand,Mahtab
MCM-48
MCM-41
cobalt tetrasulfophthalocyanine
immobilization
epoxidation of cyclohexene
title_short Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
title_full Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
title_fullStr Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
title_full_unstemmed Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
title_sort Immobilization of cobalt phthalocyanine and tetrasulfophthalocyanine onto MCM-41 and MCM-48: effect of immobilization method on catalytic activity
author Pirouzmand,Mahtab
author_facet Pirouzmand,Mahtab
Amini,Mostafa M.
Safari,Nasser
Hamoule,Touba
author_role author
author2 Amini,Mostafa M.
Safari,Nasser
Hamoule,Touba
author2_role author
author
author
dc.contributor.author.fl_str_mv Pirouzmand,Mahtab
Amini,Mostafa M.
Safari,Nasser
Hamoule,Touba
dc.subject.por.fl_str_mv MCM-48
MCM-41
cobalt tetrasulfophthalocyanine
immobilization
epoxidation of cyclohexene
topic MCM-48
MCM-41
cobalt tetrasulfophthalocyanine
immobilization
epoxidation of cyclohexene
description Cobalt tetrasulfophthalocyanine (CoPcS) was chemically anchored to amine-modified MCM-41 and MCM-48 surface. These mesoporous silica were prepared by hydrothermal procedure. Physical mixtures of CoPc in MCM-41 and in MCM-48 were also prepared for comparison purposes. The four prepared catalysts, 10 wt.% CoPcS/NH2-MCM-41, 10 wt.% CoPcS/NH2-MCM-48, 10 wt.% CoPc/MCM-41 and 10 wt.% CoPc/MCM-48, were characterized by X-ray diffractometry (XRD), diffuse reflectance UV-Vis spectroscopy and BET specific surface analysis. The catalytic activity of the immobilized catalysts was tested in the aerobic epoxidation of cyclohexene. CoPcS/NH2-MCM-41 and CoPcS/NH2-MCM-48 showed relatively high epoxide selectivity but low conversion of cyclohexene compared to CoPc/MCM-41 and CoPc/MCM-48. No leaching of metallophthalocyanine from the catalysts immobilized by chemical bonding into the reaction medium was observed and these catalysts could be reused four times.
publishDate 2013
dc.date.none.fl_str_mv 2013-11-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013001100019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532013001100019
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.5935/0103-5053.20130233
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Journal of the Brazilian Chemical Society v.24 n.11 2013
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
_version_ 1750318175338102784

Registros relacionados