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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Structural Studies of Fluoroborate Laser Glasses by Solid State NMR and EPR Spectroscopies

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Author(s):
Zhang, Ruili ; de Oliveira, Marcos ; Wang, Zaiyang ; Fernandes, Roger Gomes ; de Camargo, Andrea S. S. ; Ren, Jinjun ; Zhang, Long ; Eckert, Hellmut
Total Authors: 8
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 121, n. 1, p. 741-752, JAN 12 2017.
Web of Science Citations: 8
Abstract

The structure of glasses in the systems (100 - x)B2O3-xPbF(2) (x = 30, 40, and 50) and 50B(2)O(3)-(50 - x)PbO-xPbF(2) (x = 5, 10, 15, 20, 25, 30, 35, 40, and 45) has been studied by solid state NMR and EPR spectroscopies.-On the basis Of B-11 and F-19 high resolution solid state NMR as well as on B-11/F-19 double resonance results, we develop a quantitative structural description on the atomic scale. F-19 NMR results indicate a systematic dependence of the fluoride speciation on PbF2 content: At low x-values, F- ions are predominantly found on BO3/2F- units, whereas, at higher x-values, fluoride tends to be sequestrated into amorphous domains rich in PbF2. In addition, both pulsed EPR studies of Yb3+ doped glasses and photophysical studies of Eu3+ doped samples indicate a mixed fluoride/borate coordination of the rare-earth ions, and the absence of nanophase segregation effects. (AU)

FAPESP's process: 13/23490-3 - Magnetic resonance techniques for the study of Structure/Property correlations in photonic glassy and glass ceramic materials
Grantee:Marcos de Oliveira Junior
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 15/04063-2 - Coordination environments of rare-earth ions in photonic glasses analyzed by pulsed electron paramagnetic resonance techniques
Grantee:Marcos de Oliveira Junior
Support type: Scholarships abroad - Research Internship - Post-doctor