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: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1516-14392001000100005 http://hdl.handle.net/11449/211680 |
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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Repositório Institucional da UNESP |
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2946 |
spelling |
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.Universidade Estadual Paulista, Instituto de QuimicaUniversidade de São Paulo, FFCLRPUniversidade Estadual Paulista, Instituto de QuimicaABM, ABC, ABPolUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Nassar, Eduardo J. [UNESP]Serra, Osvaldo A.Calefi, Paulo S.Manso, Cynthia M.c.p.Neri, Cláudio R.2021-07-14T10:27:55Z2021-07-14T10:27:55Z2001-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article18-22application/pdfhttp://dx.doi.org/10.1590/S1516-14392001000100005Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 4, n. 1, p. 18-22, 2001.1516-14391980-5373http://hdl.handle.net/11449/21168010.1590/S1516-14392001000100005S1516-14392001000100005S1516-14392001000100005.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Researchinfo:eu-repo/semantics/openAccess2023-12-02T06:11:02Zoai:repositorio.unesp.br:11449/211680Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-12-02T06:11:02Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)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. [UNESP] 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. [UNESP] |
author_facet |
Nassar, Eduardo J. [UNESP] 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.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Nassar, Eduardo J. [UNESP] 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 2021-07-14T10:27:55Z 2021-07-14T10:27:55Z |
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://dx.doi.org/10.1590/S1516-14392001000100005 Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 4, n. 1, p. 18-22, 2001. 1516-1439 1980-5373 http://hdl.handle.net/11449/211680 10.1590/S1516-14392001000100005 S1516-14392001000100005 S1516-14392001000100005.pdf |
url |
http://dx.doi.org/10.1590/S1516-14392001000100005 http://hdl.handle.net/11449/211680 |
identifier_str_mv |
Materials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 4, n. 1, p. 18-22, 2001. 1516-1439 1980-5373 10.1590/S1516-14392001000100005 S1516-14392001000100005 S1516-14392001000100005.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
18-22 application/pdf |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803649872801300480 |