Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1023/A:1020784006933 http://hdl.handle.net/11449/67157 |
Resumo: | The photoluminescence features and the energy transfer processes of Nd3+-based siloxanepoly(oxyethylene) hybrids are reported. The host matrix of these materials, classed as di-ureasils, is formed by a siloxane backbone covalently bonded to polyether chains of two molecular weights by means of urea cross-links. The room-temperature photoluminescence spectra of these xerogels show a wide broad purple-blue-green band (350-570 nm), associated with the emitting centres of the di-ureasil host, and the typical near infrared emission of Nd3+ (700-1400 nm), assigned to the 4F3/2 → 4I9/2,11/2,13/2 transitions. Self-absorptions in the visible range, resonant with intra-4f3 transitions, indicate the existence of an energy conversion mechanism of visible di-ureasil emission into near infrared Nd3+ luminescence. The existence of energy transfer between the di-ureasil's emitting centres and the Nd3+ ions is demonstrated calculating the lifetimes of these emitting centres. The efficiency of that energy transfer changes both with the polymer molecular weight and the Nd3+ concentration. |
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Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybridsDi-ureasilsEnergy transferLuminescenceNeodymium triflateCrosslinkingNeodymium compoundsPhotoluminescencePolyethersSilicon compoundsThermal effectsUreaOptical amplificationSol-gelsThe photoluminescence features and the energy transfer processes of Nd3+-based siloxanepoly(oxyethylene) hybrids are reported. The host matrix of these materials, classed as di-ureasils, is formed by a siloxane backbone covalently bonded to polyether chains of two molecular weights by means of urea cross-links. The room-temperature photoluminescence spectra of these xerogels show a wide broad purple-blue-green band (350-570 nm), associated with the emitting centres of the di-ureasil host, and the typical near infrared emission of Nd3+ (700-1400 nm), assigned to the 4F3/2 → 4I9/2,11/2,13/2 transitions. Self-absorptions in the visible range, resonant with intra-4f3 transitions, indicate the existence of an energy conversion mechanism of visible di-ureasil emission into near infrared Nd3+ luminescence. The existence of energy transfer between the di-ureasil's emitting centres and the Nd3+ ions is demonstrated calculating the lifetimes of these emitting centres. The efficiency of that energy transfer changes both with the polymer molecular weight and the Nd3+ concentration.Departamento de Física Universidade de Aveiro, 3810-193 AveiroDepartamento de Química Univ. de Tras-os-Montes e Alto Douro Quinta de Prados, Apartado 1013, 5000-911 Vila Real CodexInstituto de Química UNESP, CP 355, Zip 14801-970-Araraquara, SPInstituto de Química UNESP, CP 355, Zip 14801-970-Araraquara, SPUniversidade de AveiroQuinta de PradosUniversidade Estadual Paulista (Unesp)Sá Ferreira, R. A.Carlos, L. D.De Zea Bermudez, V.Molina, C. [UNESP]Dahmouche, K. [UNESP]Messaddeq, Younes [UNESP]Ribeiro, Sidney José Lima [UNESP]2014-05-27T11:20:35Z2014-05-27T11:20:35Z2003-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject315-319http://dx.doi.org/10.1023/A:1020784006933Journal of Sol-Gel Science and Technology, v. 26, n. 1-3, p. 315-319, 2003.0928-0707http://hdl.handle.net/11449/6715710.1023/A:1020784006933WOS:0001787891000562-s2.0-0037267475299850384191781564460474630346540000-0003-3286-9440Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Sol-Gel Science and Technology1.7450,477info:eu-repo/semantics/openAccess2021-10-23T21:44:15Zoai:repositorio.unesp.br:11449/67157Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T21:44:15Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids |
title |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids |
spellingShingle |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids Sá Ferreira, R. A. Di-ureasils Energy transfer Luminescence Neodymium triflate Crosslinking Neodymium compounds Photoluminescence Polyethers Silicon compounds Thermal effects Urea Optical amplification Sol-gels |
title_short |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids |
title_full |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids |
title_fullStr |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids |
title_full_unstemmed |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids |
title_sort |
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids |
author |
Sá Ferreira, R. A. |
author_facet |
Sá Ferreira, R. A. Carlos, L. D. De Zea Bermudez, V. Molina, C. [UNESP] Dahmouche, K. [UNESP] Messaddeq, Younes [UNESP] Ribeiro, Sidney José Lima [UNESP] |
author_role |
author |
author2 |
Carlos, L. D. De Zea Bermudez, V. Molina, C. [UNESP] Dahmouche, K. [UNESP] Messaddeq, Younes [UNESP] Ribeiro, Sidney José Lima [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de Aveiro Quinta de Prados Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Sá Ferreira, R. A. Carlos, L. D. De Zea Bermudez, V. Molina, C. [UNESP] Dahmouche, K. [UNESP] Messaddeq, Younes [UNESP] Ribeiro, Sidney José Lima [UNESP] |
dc.subject.por.fl_str_mv |
Di-ureasils Energy transfer Luminescence Neodymium triflate Crosslinking Neodymium compounds Photoluminescence Polyethers Silicon compounds Thermal effects Urea Optical amplification Sol-gels |
topic |
Di-ureasils Energy transfer Luminescence Neodymium triflate Crosslinking Neodymium compounds Photoluminescence Polyethers Silicon compounds Thermal effects Urea Optical amplification Sol-gels |
description |
The photoluminescence features and the energy transfer processes of Nd3+-based siloxanepoly(oxyethylene) hybrids are reported. The host matrix of these materials, classed as di-ureasils, is formed by a siloxane backbone covalently bonded to polyether chains of two molecular weights by means of urea cross-links. The room-temperature photoluminescence spectra of these xerogels show a wide broad purple-blue-green band (350-570 nm), associated with the emitting centres of the di-ureasil host, and the typical near infrared emission of Nd3+ (700-1400 nm), assigned to the 4F3/2 → 4I9/2,11/2,13/2 transitions. Self-absorptions in the visible range, resonant with intra-4f3 transitions, indicate the existence of an energy conversion mechanism of visible di-ureasil emission into near infrared Nd3+ luminescence. The existence of energy transfer between the di-ureasil's emitting centres and the Nd3+ ions is demonstrated calculating the lifetimes of these emitting centres. The efficiency of that energy transfer changes both with the polymer molecular weight and the Nd3+ concentration. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-01-01 2014-05-27T11:20:35Z 2014-05-27T11:20:35Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1023/A:1020784006933 Journal of Sol-Gel Science and Technology, v. 26, n. 1-3, p. 315-319, 2003. 0928-0707 http://hdl.handle.net/11449/67157 10.1023/A:1020784006933 WOS:000178789100056 2-s2.0-0037267475 2998503841917815 6446047463034654 0000-0003-3286-9440 |
url |
http://dx.doi.org/10.1023/A:1020784006933 http://hdl.handle.net/11449/67157 |
identifier_str_mv |
Journal of Sol-Gel Science and Technology, v. 26, n. 1-3, p. 315-319, 2003. 0928-0707 10.1023/A:1020784006933 WOS:000178789100056 2-s2.0-0037267475 2998503841917815 6446047463034654 0000-0003-3286-9440 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Sol-Gel Science and Technology 1.745 0,477 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
315-319 |
dc.source.none.fl_str_mv |
Scopus 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 |
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1799965118542381056 |