Novel Preparation and Characterization of Divalent Samarium:Barium Octoborate

Evans, Samari Y.; Hawkins, KaDesia M.; Gharavi-Naeini, Jafar; Stump, Nathan A.

doi:10.1246/cl.160467

Cited by 10 publications

(18 citation statements)

References 14 publications

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“…1–5 The reduction of the samarium and the specific samarium(II) sites formed as delineated by emission spectroscopy have been found to be consistent with products prepared by solid-state sintering methods and by firing of co-precipitated borates of the metal species. 1–5 The emission spectrum characteristic of Sm 2+ -doped barium octaborate has been previously studied with ultraviolet (UV) (337 nm and 351 nm) excitation at various temperatures. 3–5 However, the overlapping of emission features resulting from multiple samarium sites limited the conclusions that could be drawn from the reported results.…”

Section: Introductionmentioning

confidence: 56%

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Luminescence Study of the Samarium(II) Sites in Samarium: Barium Octaborate as Differentiated by Excitation Wavelength and Temperature

2017

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Divalent samarium incorporated in a barium octaborate matrix prepared by firing homogeneous precipitates has been studied with emission spectroscopy. One of the samarium sites associated with this product exhibits an extremely strong temperature dependence upon using an excitation wavelength of 532 nm. This effect allows for specific differentiation between the two major Sm(II) sites associated with this compound. Based on the assignment of the emission features to specific sites, the symmetry of the first samarium environment is thought to be C or C while that associated with the second site appears to be C.

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Section: Introductionmentioning

confidence: 56%

“…3–5 However, the overlapping of emission features resulting from multiple samarium sites limited the conclusions that could be drawn from the reported results. 3–5…”

Section: Introductionmentioning

confidence: 86%

Luminescence Study of the Samarium(II) Sites in Samarium: Barium Octaborate as Differentiated by Excitation Wavelength and Temperature

2017

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“…The preparation of Sm doped into barium tetraborate and barium sodium nonaborate were analogous to the methods described previously for barium octoborate 16,17 and pentaborate. 18 The samples were prepared by homogeneous co-precipitation of Sm +3 and Ba +2 with sodium tetraborate.…”

Section: Methodsmentioning

confidence: 99%

“…The borate matrices were examined using powder X-ray diffraction for structural confirmation and their emission spectra were measured to examine the reduction of samarium to its divalent state in the host matrices, as described previously. 14–18…”

Section: Methodsmentioning

confidence: 99%

“…Our group has been pursuing an alternate method for the preparation of borate-based phosphors exhibiting enhanced emission in the deep red spectral region. 14–18 The process uses co-precipitation of Sm +3 and Sr +2 /Ba +2 with sodium tetraborate, followed by air firing of the samples. 14–18 The method has produced samples of samarium-doped alkaline earth metal borates in which Sm +3 has been reduced to Sm +2 , including Sm:SrB 4 O 7 , 14 Sm:Sr 2 B 16 O 26 , 15 Sm:BaB 8 O 13 , 16,17 and Sm:Ba 2 B 10 O 17 .…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Barium Borate Frameworks Using Raman Spectroscopy

2017

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Systematic micro-Raman scattering investigations have been carried out on Sm doped 2(BaO)-n(BO) matrices for n = 4, 5, 8, and 2(BaO)-(NaO)-9(BO) using the 364 nm excitation of an Ar laser. The Raman results have been compared with the known structures of barium tetraborate, barium pentaborate, barium octaborate, and barium sodium nonaborate. An excellent correlation has been found between the BO/BO composition ratios for each product and intensity ratios of the designated BO and BO Raman peaks. Furthermore, the Raman frequencies of both BO and BO groups undergo a systematic blueshift as n increases from four to nine. The shift results from a decrease of the B-O bond lengths for both BO and BO groups as the samples transition from the tetraborate to nonaborate structures. Linear relations (with negative slopes) have been determined between the measured Raman frequencies and B-O bond lengths in the frameworks.

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Lanthanide reduction in the novel preparation of samarium doped strontium and barium sodium nonaborates

Gharavi-Naeini

Stump

2018

Inorganica Chimica Acta

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Novel Preparation and Characterization of Divalent Samarium:Barium Octoborate

Cited by 10 publications

References 14 publications

Luminescence Study of the Samarium(II) Sites in Samarium: Barium Octaborate as Differentiated by Excitation Wavelength and Temperature

Luminescence Study of the Samarium(II) Sites in Samarium: Barium Octaborate as Differentiated by Excitation Wavelength and Temperature

Characterization of Barium Borate Frameworks Using Raman Spectroscopy

Lanthanide reduction in the novel preparation of samarium doped strontium and barium sodium nonaborates

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