b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica
Autor(a) principal: | |
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Data de Publicação: | 2001 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000100005 |
Resumo: | Silica gel was functionalised with chloropropyl groups through the sol-gel process and then a beta-diketone was incorporated into the support. Afterwards, Eu3+ ion and its chelates of 1,10-phenantroline (phen) and 2,2'-bipyridine (bpy), red phosphors, were supported on such silica. Luminescence studies of Eu3+ bound to this new material have shown that there is an increase in the intensity of the emission when the ion is isolated by ligands in the silica matrix. The energy transfer from the ligands phen and bpy to Eu3+ ion was observed in the excitation spectra, which present new bands ascribed to the ligands and/or complex. The Eu3+-functionalised silica was characterised by TGA and FTIR. TGA analysis showed that there is a large loss of mass around 300 °C, which is ascribed to the organic part of the material. The FTIR spectra presented the vibration modes for Si-C and -CH2-. The luminescent properties of the ions surrounding the Eu3+ ion were studied. The decay curve displayed a bi-exponential behaviour, indicating that there is more than one site of Eu3+ on the surface of the silica. |
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b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silicarare earthsol-gel processfunctionalised silicaluminescencered phosphorSilica gel was functionalised with chloropropyl groups through the sol-gel process and then a beta-diketone was incorporated into the support. Afterwards, Eu3+ ion and its chelates of 1,10-phenantroline (phen) and 2,2'-bipyridine (bpy), red phosphors, were supported on such silica. Luminescence studies of Eu3+ bound to this new material have shown that there is an increase in the intensity of the emission when the ion is isolated by ligands in the silica matrix. The energy transfer from the ligands phen and bpy to Eu3+ ion was observed in the excitation spectra, which present new bands ascribed to the ligands and/or complex. The Eu3+-functionalised silica was characterised by TGA and FTIR. TGA analysis showed that there is a large loss of mass around 300 °C, which is ascribed to the organic part of the material. The FTIR spectra presented the vibration modes for Si-C and -CH2-. The luminescent properties of the ions surrounding the Eu3+ ion were studied. The decay curve displayed a bi-exponential behaviour, indicating that there is more than one site of Eu3+ on the surface of the silica.ABM, ABC, ABPol2001-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000100005Materials Research v.4 n.1 2001reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392001000100005info:eu-repo/semantics/openAccessNassar,Eduardo J.Serra,Osvaldo A.Calefi,Paulo S.Manso,Cynthia M.C.P.Neri,Cláudio R.eng2001-03-09T00:00:00Zoai:scielo:S1516-14392001000100005Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2001-03-09T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica |
title |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica |
spellingShingle |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica Nassar,Eduardo J. rare earth sol-gel process functionalised silica luminescence red phosphor |
title_short |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica |
title_full |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica |
title_fullStr |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica |
title_full_unstemmed |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica |
title_sort |
b-diketonates of Eu3+, red phosphors, supported on sol-gel functionalised silica |
author |
Nassar,Eduardo J. |
author_facet |
Nassar,Eduardo J. Serra,Osvaldo A. Calefi,Paulo S. Manso,Cynthia M.C.P. Neri,Cláudio R. |
author_role |
author |
author2 |
Serra,Osvaldo A. Calefi,Paulo S. Manso,Cynthia M.C.P. Neri,Cláudio R. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Nassar,Eduardo J. Serra,Osvaldo A. Calefi,Paulo S. Manso,Cynthia M.C.P. Neri,Cláudio R. |
dc.subject.por.fl_str_mv |
rare earth sol-gel process functionalised silica luminescence red phosphor |
topic |
rare earth sol-gel process functionalised silica luminescence red phosphor |
description |
Silica gel was functionalised with chloropropyl groups through the sol-gel process and then a beta-diketone was incorporated into the support. Afterwards, Eu3+ ion and its chelates of 1,10-phenantroline (phen) and 2,2'-bipyridine (bpy), red phosphors, were supported on such silica. Luminescence studies of Eu3+ bound to this new material have shown that there is an increase in the intensity of the emission when the ion is isolated by ligands in the silica matrix. The energy transfer from the ligands phen and bpy to Eu3+ ion was observed in the excitation spectra, which present new bands ascribed to the ligands and/or complex. The Eu3+-functionalised silica was characterised by TGA and FTIR. TGA analysis showed that there is a large loss of mass around 300 °C, which is ascribed to the organic part of the material. The FTIR spectra presented the vibration modes for Si-C and -CH2-. The luminescent properties of the ions surrounding the Eu3+ ion were studied. The decay curve displayed a bi-exponential behaviour, indicating that there is more than one site of Eu3+ on the surface of the silica. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-01-01 |
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=S1516-14392001000100005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000100005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392001000100005 |
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 |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.4 n.1 2001 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212656612376576 |