Optical and Structural Studies of Mn<sup>2+</sup>Doped SbPO<sub>4</sub>-ZnO-PbO Glasses

Manzan, Renata S.; Donoso, José Pedro; Magon, Cláudio José; Silva, Igor d'Anciães A.; Rüssel, Christian; Nalin, Marcelo

doi:10.5935/0103-5053.20150289

Cited by 7 publications

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“…All EPR spectra of MnHF and CoMnHF compounds showed a singlet signal with an average line width of 20 gauss, with the exception of CoHF compound, which was EPR-silent. The Mn coordinated to N exhibited electronic configuration in high spin t 2g 3 e g 2 with S = 5 / 2 ,such that, in EPR experiments, three Kramer’s doublets, ± 5 / 2 , ± 3 / 2 and ± 1 / 2 , were expected. However, at room temperature (Figure A), the MnHF compound shows a broad singlet EPR signal with g = 2.023.…”

Section: Resultsmentioning

confidence: 97%

Enhancement of Stability by Positive Disruptive Effect on Mn–Fe Charge Transfer in Vacancy-Free Mn–Co Hexacyanoferrate Through a Charge/Discharge Process in Aqueous Na-Ion Batteries

et al. 2018

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Several materials have been studied as electrodes for aqueous batteries that use sodium as alkali ion; these include Prussian blue analogue or hexacyanoferrates. The inhibition or disruption on metal−metal charge transfer plays an important role for improving electrochemical stability of the material. The stability improvement is achieved when two external metals are coordinated to N ends in the Na-rich hexacyanoferrates. Additionally, the presence of vacancies in the material is another important factor that influences its stability. In this study, Na x Co 1−y Mn y [Fe(CN) 6 ] has been synthesized at different Mn/Co ratios by precipitation using citrate as a chelating agent to obtain a material without vacancies. Its electrochemical behavior during redox processes and the correlation with the electronic interaction between external metal sites in the framework through the interaction of spins have been studied too. To discuss the effect of the presence of [Fe(CN) 6 ] nvacancies on the electrochemical process, we synthesized a material without citrate for obtaining materials with low ferrocyanide vacancies. The vacancy-free Co 0.55 Mn 0.45 HF versus n-CoMnHF, were compared in this work. These studies reveal that manganese hexacyanoferrate is unstable. The partial substitution of Co by Mn modifies the metals spin ordering and consequently, the interaction between metals coordinated to N in the cyanide linker. Such partial substitution, with a Mn/Co ratio of 1:1 (Co 0.55 Mn 0.45 HF), improves the electrochemical stability and enhances the discharged potential as well. On the other hand, when vacancies are present, the n-CoMnHF compound showed a decrease in its crystallinity as well as in its external metal interaction. Both changes may be due to the presence of coordinated water, which modifies electrochemical performance. A spontaneous hopping from Mn to Fe during oxidation in n-CoMnHF was detected, but this phenomenon was disrupted in Co 0.55 Mn 0.45 HF. Such charge transfer inhibition was associated with the modification of electron delocalization on Fe (LS); which was caused by the external metals; mainly by Co.

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Section: Resultsmentioning

confidence: 97%

Enhancement of Stability by Positive Disruptive Effect on Mn–Fe Charge Transfer in Vacancy-Free Mn–Co Hexacyanoferrate Through a Charge/Discharge Process in Aqueous Na-Ion Batteries

et al. 2018

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“…The (LV) peak at 1.93 eV (642 nm) in the Mn (7) hybrid compound can be assigned to the spin forbidden 4 T 1g (G) → 6 A 1g transition of Mn 2+ . 58,66,67 The LV band, observed in compounds ( 4), ( 5), (6), and ( 7), displayed variations in peak position and intensity. In ( 4) and ( 5), the LV peak's origin was not linked to Zn 2+ or Cu 2+ , respectively.…”

Section: Dalton Transactionsmentioning

confidence: 99%

A new series of magnetic and luminescent layered hybrid materials obtained from thianthrene phosphonic acid: M(H₂O)PO₃-S₂C₁₂H₇ (M = Cu, Zn) and M(H₂O)₂(PO₂OH-S₂C₁₂H₇)₂ (M = Mn, Co)

Letheux,

Ganesan,

Veillon

et al. 2023

Dalton Trans.

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“…Due to the higher proportion of SbPO4 in the glasses studied, the curves predominantly present bands characteristic of the phosphate groups, and can be attributed as published by Nalin et al 4 The band at 300 cm -1 is assigned to group modes. 1 The bands at 461 and 404 cm -1 are assigned to symmetrical deformation of the PO4 and the asymmetric deformation of Sb-O, respectively. While the bands at 617 and 551 cm -1 are assigned to the asymmetrical stretches of vibrational modes P-O-Sb and asymmetrical stretching Sb-O.…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…Antimony phosphate glasses containing heavy metal oxides 1,2 have been studied due to their interesting characteristics like high linear and nonlinear refractive indexes 3,4 , large transmission window 5 , low phonon energy 6,7 , which make them promising materials for several technological applications in photonics [8][9][10] and plasmonics 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Incorporation of CdFe2O4SiO2 nanoparticles in SbPO4-ZnO-PbO glasses by melting quenching process

et al. 2018

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The development of glasses containing nanoparticles dispersed homogeneously with controlled size and optimum parameters for functionality is a challenge. Glasses in the ternary system 60SbPO4-30ZnO-10PbO containing CdFe2O4-SiO2 nanoparticles were studied. The CdFe2O4 nanoparticles were synthesized by the coprecipitation method and the average size was 3.9 nm and then, they were protected by a silica layer. The nanoparticles were mixed with the glass precursors and transformed into glasses by melt-quenching method. Thermal and structural properties were evaluated by differential scanning calorimetry, Raman spectroscopy, scanning electronic microscopy and transmission electron microscopy. While the optical properties were studied by M-Lines spectroscopy and UV-VIS spectroscopy. The glass samples obtained were completely transparent, with amber color and showed no sign of crystallization according to the techniques used. Scanning and transmission electron microscopy confirm that the methodology used for the incorporation of nanoparticles was efficient. The nanoparticle protection methodology prior to incorporation into glasses may contribute towards the development of glasses containing nanoparticles useful for magneto-optics devices.

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Optical and Structural Studies of Mn²⁺Doped SbPO₄-ZnO-PbO Glasses

Cited by 7 publications

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Enhancement of Stability by Positive Disruptive Effect on Mn–Fe Charge Transfer in Vacancy-Free Mn–Co Hexacyanoferrate Through a Charge/Discharge Process in Aqueous Na-Ion Batteries

Enhancement of Stability by Positive Disruptive Effect on Mn–Fe Charge Transfer in Vacancy-Free Mn–Co Hexacyanoferrate Through a Charge/Discharge Process in Aqueous Na-Ion Batteries

A new series of magnetic and luminescent layered hybrid materials obtained from thianthrene phosphonic acid: M(H₂O)PO₃-S₂C₁₂H₇ (M = Cu, Zn) and M(H₂O)₂(PO₂OH-S₂C₁₂H₇)₂ (M = Mn, Co)

Incorporation of CdFe2O4SiO2 nanoparticles in SbPO4-ZnO-PbO glasses by melting quenching process

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Optical and Structural Studies of Mn2+Doped SbPO4-ZnO-PbO Glasses

Cited by 7 publications

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Enhancement of Stability by Positive Disruptive Effect on Mn–Fe Charge Transfer in Vacancy-Free Mn–Co Hexacyanoferrate Through a Charge/Discharge Process in Aqueous Na-Ion Batteries

Enhancement of Stability by Positive Disruptive Effect on Mn–Fe Charge Transfer in Vacancy-Free Mn–Co Hexacyanoferrate Through a Charge/Discharge Process in Aqueous Na-Ion Batteries

A new series of magnetic and luminescent layered hybrid materials obtained from thianthrene phosphonic acid: M(H2O)PO3-S2C12H7 (M = Cu, Zn) and M(H2O)2(PO2OH-S2C12H7)2 (M = Mn, Co)

Incorporation of CdFe2O4SiO2 nanoparticles in SbPO4-ZnO-PbO glasses by melting quenching process

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Optical and Structural Studies of Mn²⁺Doped SbPO₄-ZnO-PbO Glasses

A new series of magnetic and luminescent layered hybrid materials obtained from thianthrene phosphonic acid: M(H₂O)PO₃-S₂C₁₂H₇ (M = Cu, Zn) and M(H₂O)₂(PO₂OH-S₂C₁₂H₇)₂ (M = Mn, Co)