BiF3Incorporation in Na/Ba Mixed Network Modifier Fluoride-Phosphate Glasses: Structural Studies by Solid-State NMR and Raman Spectroscopies

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorWestfälische Wilhelms-Universität Münster-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorGalleani, Gustavo-
Autor(es): dc.creatorBradtmüller, Henrik-
Autor(es): dc.creatorFares, Hssen [UNESP]-
Autor(es): dc.creatorSantagneli, Silvia Helena [UNESP]-
Autor(es): dc.creatorNalin, Marcelo [UNESP]-
Autor(es): dc.creatorEckert, Hellmut-
Data de aceite: dc.date.accessioned2022-02-22T00:44:33Z-
Data de disponibilização: dc.date.available2022-02-22T00:44:33Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-11-18-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acs.jpcc.0c07792-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/205521-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/205521-
Descrição: dc.descriptionBismuth-containing rare-earth codoped fluoride phosphate glasses are promising materials for superbroadband near-infrared (NIR) emission with potential applications in optical amplification. To elucidate their structural organization, this contribution develops a comprehensive multinuclear solid-state single and 31P/19F double resonance NMR strategy, applied to glasses in the system (BiF3)y(50NaPO3-20Ba(PO3)2-20NaF-10BaF2)100-y (y = 0, 5, 10, 20, 30, 40). To separately assess the influence of bismuth and fluorine constituents on the network structure, an additional set of (NaPO3)50-2x(Ba(PO3)2)20-x(NaF)20+2x(BaF2)10+x (x = 0, 2.5, 5.0, 7.5) glasses was also investigated. Introduction of alkali fluoride ions into phosphate glasses is shown to follow a new network modification scheme involving depolymerization of polyphosphate chains under the formation of F-bonded fluorophosphate units. However, a significant part of the fluoride stays separate, interacting exclusively with metal-ion species. 23Na MAS and 23Na{31P} double resonance NMR results are consistent with a local sodium ion environment dominated by phosphate ions in the Bi-free system, whereas in the BiF3-containing glasses, the successive reduction of the dipolar second moment M2(Na-P) with increasing BiF3 content reflects the expected dilution effect, accompanied by increasing competition of the fluoride ions for ligation with the Na+ ions.-
Descrição: dc.descriptionSão Carlos Institute of Physics São Paulo University-USP, Avenida Trabalhador Saocarlense 400-
Descrição: dc.descriptionInstitut für Physikalische Chemie Westfälische Wilhelms-Universität Münster, Corrensstrasse 30-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University-UNESP, Avenida Professor Francisco Degni, 55-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University-UNESP, Avenida Professor Francisco Degni, 55-
Formato: dc.format25578-25587-
Idioma: dc.languageen-
Relação: dc.relationJournal of Physical Chemistry C-
???dc.source???: dc.sourceScopus-
Título: dc.titleBiF3Incorporation in Na/Ba Mixed Network Modifier Fluoride-Phosphate Glasses: Structural Studies by Solid-State NMR and Raman Spectroscopies-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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