Structure of lead borate glasses by Raman, 11B MAS, and 207Pb NMR spectroscopies

Chatzipanagis, Konstantinos; Tagiara, Nagia S.; Kamitsos, E. I.; Barrow, Nathan S.; Slagle, Ian; Wilson, Robert L.; Greiner, Tyler; Jesuit, Martha; Léonard, Nicholas; Phillips, Aaron; Reynolds, B.; Royle, B.; Ameku, Katherine; Feller, Steve

doi:10.1016/j.jnoncrysol.2022.121660

Cited by 22 publications

(29 citation statements)

References 48 publications

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“…As PbO replaces Sb 2 O 3 , the IR profile suggests both the existence of Pb 2+ ions in modifying sites and in PbO 4 units assuming network forming roles. This is in‐line with recent findings for the role of Pb 2+ in glasses x PbO–(100− x )B 2 O 3 with 30 ≤ x ≤ 80; Pb–O bonding is primarily ionic for x = 30–50 but it becomes significantly covalent when x > 65 78 . Overall, the IR spectra of Figure 7 suggest a glassy network comprised SbO 3 , WO 4 , PbO 4 , and SiO 4 structural units with slight modification by Na + and Pb 2+ ions.…”

Section: Resultssupporting

confidence: 92%

“…Lead borates have a Raman band at 310 cm −1 that trends with the 140 cm −1 band, together being characteristic of PbO n units functioning as network formers. 78 This feature in lead borates is broad compared to the 321 cm −1 feature in Figure 8, which is well resolved in the potassium analogue. Given the discussion of the ternary alkali-tungsten-antimonites above (Figure 5), the 321 cm −1 feature is most likely the ν 2 (E) bending mode of [WO 4 ] 2− species.…”

Section: Raman Spectroscopymentioning

confidence: 65%

“…Compared to Figure 4, new bands are seen at 170, 321, 797, 880, and 920 cm −1 . The band at 170 cm −1 can be assigned to Pb–O activity of the covalent PbO n units 73,74,78,79 . The band at 321 cm −1 is due to Pb–O stretching activity and/or [WO 4 ] 2− bending activity.…”

Section: Resultsmentioning

confidence: 99%

“…The band at 170 cm −1 can be assigned to Pb-O activity of the covalent PbO n units. 73,74,78,79 The band at 321 cm −1 is due to Pb-O stretching activity and/or [WO 4 ] 2− bending activity. Lead borates have a Raman band at 310 cm −1 that trends with the 140 cm −1 band, together being characteristic of PbO n units functioning as network formers.…”

Section: Raman Spectroscopymentioning

confidence: 99%

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Second‐harmonic generation and structural rearrangements in multicomponent antimonite glasses by electrothermal poling

et al. 2023

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Electrothermal poling is shown here to effectively induce second-order nonlinear effects in heavy-metal oxide antimonite glasses. In M 2 O-PbO-WO 3 -Sb 2 O 3 (M = Li, Na, K) glasses, the poling-induced second-harmonic generation intensity is five times larger than in silica (Infrasil) for M = Na, twice as large as in silica for M = Li, and smaller than in silica for M = K. X-ray photoelectron spectroscopy suggests that antimony ions exist predominantly in the trivalent oxidation state in the studied glass samples. Raman and infrared spectroscopy confirm that the glass network is comprised of SbO 3 , WO 4 , WO 6 , and PbO 4 units-with some SiO 4 moieties due to leaching from the silica crucible. The WO 4 units appear to exist in two distinct sites, as evidenced by comparison of the vibrational spectra of alkali-tungsten-antimonite glasses with those of previously reported crystalline tungstate phases. The alkali type influences the equilibrium between tetrahedral tungstate anions, [WO 4 ] 2− , and the isomeric partially polymerized octahedral tungstate units, [WØ 4 O 2 ] 2− (Ø denotes a bridging oxygen). Raman spectroscopy line scans were used to track near-surface structural changes on the anode side of poled glasses. They reveal that the tungstate equilibrium is also affected by poling. At the anode side, the population of partially polymerized [WØ 4 O 2 ] 2− species increases at the expense of anionic [WO 4 ] 2− species. This yields a net increase in the average bond length of the network forming constituents, which is commensurate with poling-induced structural changes observed in other systems experimentally and computationally.

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Section: Resultssupporting

confidence: 92%

Section: Raman Spectroscopymentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Section: Raman Spectroscopymentioning

confidence: 99%

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Second‐harmonic generation and structural rearrangements in multicomponent antimonite glasses by electrothermal poling

et al. 2023

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“…6,52,67,68 The last case results in a red shift in the frequency such that the B–O − stretching in (BØ 2 O) − entities are subsequently found in the range 1300–1400 cm −1 , as seen in Pb and Bi borates. 6,52,83 A similar red shift is not seen for any of the B–O − stretching due to pyroborate or orthoborate units in these zinc borate glasses, so the position of the high frequency band is more likely to be explainable by the configuration and neighboring borate species.…”

Section: Resultsmentioning

confidence: 83%

Zinc borate glasses: properties, structure and modelling of the composition-dependence of borate speciation

Topper

Möncke

Yougman

et al. 2023

Phys. Chem. Chem. Phys.

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Structural, photoluminescence, and optical characteristics of a Sm³⁺‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

Kotb,

Okasha,

Zidan

et al. 2024

Luminescence

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In this study, the melt quenching approach is used to synthesize a lead borate–strontium‐based glass system doped with samarium ions. Modifications in the glass network structure arising from the addition of various concentrations of Sm3+ ions were investigated via Fourier transform infrared (FTIR) spectroscopy. FTIR analysis revealed B–O–B bridges, BO3, and BO4 units are present. UV–vis–NIR spectroscopic measurement was performed to study the optical absorption spectra. Optical constants such as optical bandgap energies, refractive indices, and other related parameters were evaluated. The lifetime fluorescence decay was measured and ranged between 1.04 and 1.88 ns. The photoluminescence spectra in the range 500–750 nm revealed four transitions from the ground state 6G5/2 to the excited states 6H5/2, 6H7/2, 6H9/2 and 6H11/2 and J–O theory was utilized to study these optical transitions for Sm3+ ions. Calculations of the oscillator strengths and J–O intensity parameters were performed and the obtained J–O parameters followed the sequence Ω4 > Ω6 > Ω2. The ratio O/R indicated a high lattice asymmetry around the samarium ions. The values of lifetimes and branching ratios for the fabricated samples emphasized their suitability to be used in laser applications. The current glass samples are good candidates for orange and red emission devices.

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Structure of lead borate glasses by Raman, 11B MAS, and 207Pb NMR spectroscopies

Cited by 22 publications

References 48 publications

Second‐harmonic generation and structural rearrangements in multicomponent antimonite glasses by electrothermal poling

Second‐harmonic generation and structural rearrangements in multicomponent antimonite glasses by electrothermal poling

Zinc borate glasses: properties, structure and modelling of the composition-dependence of borate speciation

Structural, photoluminescence, and optical characteristics of a Sm³⁺‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

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Structure of lead borate glasses by Raman, 11B MAS, and 207Pb NMR spectroscopies

Cited by 22 publications

References 48 publications

Second‐harmonic generation and structural rearrangements in multicomponent antimonite glasses by electrothermal poling

Second‐harmonic generation and structural rearrangements in multicomponent antimonite glasses by electrothermal poling

Zinc borate glasses: properties, structure and modelling of the composition-dependence of borate speciation

Structural, photoluminescence, and optical characteristics of a Sm3+‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties

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Product

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Structural, photoluminescence, and optical characteristics of a Sm³⁺‐doped lead borate–strontium–tungsten glass system: Evaluation of Judd–Ofelt intensity parameters and radiative properties