Compositional Optimization of Emission Properties for Rare-Earth Doped Fluoride Phosphate Glasses: Structural Investigations via NMR, EPR, and Optical Spectroscopies

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorWestfalische Wilhelms Univ Munster-
Autor(es): dc.creatorGalleani, Gustavo-
Autor(es): dc.creatorDoerenkamp, Carsten-
Autor(es): dc.creatorSantagneli, Silvia [UNESP]-
Autor(es): dc.creatorMagon, Claudio Jose-
Autor(es): dc.creatorCamargo, Andrea S. S. de-
Autor(es): dc.creatorEckert, Hellmut-
Data de aceite: dc.date.accessioned2022-02-22T00:11:53Z-
Data de disponibilização: dc.date.available2022-02-22T00:11:53Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2019-12-25-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acs.jpcc.9b10851-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/197322-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/197322-
Descrição: dc.descriptionA detailed structural investigation of two series of fluoride phosphate glasses with nominal compositions 20BaF(2)-20SrF(2)-20ZnF(2)-xIn(PO3)(3)-(40 - x)InF3 (x = 0, 5, 10, and 15) and 20BaF(2)-20SrF(2)-20ZnF(2)-10ScF(3)-xIn(PO3)(3)-(30 - x)InF3 (x = 0, 10, 15, 20), both doped with either 0.2 mol % Yb3+ or 0.S mol % Eu3+, has been conducted. As indicated by Raman scattering and solid- state NMR, the network structure is dominated by six-coordinated In3+, orthophosphate Q((0)()) species, and the (near) absence of P-O-P connectivity. The ligand environment of the rare-earth ions is studied by (1) Sc-45 NMR of the diamagnetic mimic Sc3+, (2) echo-detected field-sweep EPR spectra at the X-band, using Yb3+ spin probes, and (3) excitation and emission spectroscopy of Eu3+ dopants. Sc-45{P-31} rotational echo double resonance (REDOR) results, the ratio of the Eu3+ D-5(0) -> F-7(2) to (5) D-0 -> F-7(1) emission intensities, the lifetime values of the Eu3+ emitting level D-5(0), as well as the g factor measured by EPR spectroscopy consistently indicate that the fluoride ligands strongly dominate in the first coordination sphere of the rare-earth ions. This result stands in contrast to previous studies on aluminofluorophosphate glasses with similar compositions that show mixed ligation of the rare-earth ions by fluoride and phosphate ions. Thus, by substituting aluminum by its homologue indium one can achieve the original design goal of fluoride phosphate glasses, which is the creation of a framework structure dominated by oxide, while the local environment of the RE emitting ion is dominated by fluoride ligands, so as to improve their emissive properties. The results also illustrate the successful use of the previously developed combined NMR/EPR/optical characterization strategy for the design of optimized matrices for rare-earth ion emitters.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDeutsche Forschungsgemeinschaft-
Descrição: dc.descriptionUniv Sao Paulo, Inst Fis Sao Carlos, Ave Trabalhador Saocarlense 400, BR-13566590 Sao Carlos, SP, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Inst Quim, Rua Prof Francisco Degni 55, BR-14800060 Araraquara, SP, Brazil-
Descrição: dc.descriptionWestfalische Wilhelms Univ Munster, Inst Phys Chem, Corrensstr 30, D-48149 Munster, Germany-
Descrição: dc.descriptionUniv Estadual Paulista, Inst Quim, Rua Prof Francisco Degni 55, BR-14800060 Araraquara, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2018/03931-9-
Descrição: dc.descriptionFAPESP: 2018/24735-3-
Descrição: dc.descriptionFAPESP: 2017/06649-0-
Descrição: dc.descriptionCNPq: 406611/2017-3-
Descrição: dc.descriptionDeutsche Forschungsgemeinschaft: 413550885-
Descrição: dc.descriptionFAPESP: 2013/07793-6-
Formato: dc.format31219-31231-
Idioma: dc.languageen-
Publicador: dc.publisherAmer Chemical Soc-
Relação: dc.relationJournal Of Physical Chemistry C-
???dc.source???: dc.sourceWeb of Science-
Título: dc.titleCompositional Optimization of Emission Properties for Rare-Earth Doped Fluoride Phosphate Glasses: Structural Investigations via NMR, EPR, and Optical Spectroscopies-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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