Structure cristalline du composé RbEu3F10

Arbus, A.; Fournier, M.T.; Picaud, B.; Boulon, G.; Vedrine, A.

doi:10.1016/0022-4596(80)90002-x

Cited by 16 publications

(5 citation statements)

References 13 publications

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“…Compared with that of EuF 3 , the nitrogen content of NH 4 Eu 3 F 10 was higher, and the peaks of Eu 3d 5/2 spectrum slightly negatively shifted, which can be ascribed to the variation of electron cloud density on Eu 3+ due to the difference between the bonds of Eu-F in EuF 3 and NH 4 Eu 3 F 10 . [22][23][24][25] The results resemble those of EuF 3 :Tb 3+ and EuF 3 :Tb 3+ /NH 4 + hollow sub-microstructures we previously reported. 26 The ratio of N, Eu and F detected by XPS is 3.7 : 11.0 : 31.4, which is approximate to the stoichiometric ratio 1 : 3 : 10 of NH 4 Eu 3 F 10 , and further confirms the preparation of NH 4 Eu 3 F 10 .…”

Section: Resultssupporting

confidence: 87%

Controllable synthesis of NH₄Eu₃F₁₀nanospheres and application in bioimaging

Zhang

Chen

et al. 2014

CrystEngComm

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Cubic phase NH 4 Eu 3 F 10 nanospheres with controllable sizes were synthesized via a modified hydrothermal route by varying the dosage of ammonium hydroxide solution. Dependence of structure and morphology on the dosage of ammonia water and reaction time were investigated by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). Being unstable, NH 4 Eu 3 F 10 decomposed into EuF 3 and NH 4 F during the long-time hydrothermal treatment. EDTA, as the chelation agent of Eu 3+ and the capping ligand on the surface of as-obtained nanospheres, showed different chelating abilities depending on the dosage of ammonium hydroxide solution. Increasing the amount of ammonia not only decreased the effective concentration of Eu 3+ , but also decelerated the growth of NH 4 Eu 3 F 10 nanospheres and stabilized them by reducing the surface energy. Given the satisfactory hydrophilicity, biocompatibility, and luminescence, the as-obtained nanospheres were applied as promising agents for cell imaging by presenting high contrast.

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Section: Resultssupporting

confidence: 87%

Controllable synthesis of NH₄Eu₃F₁₀nanospheres and application in bioimaging

Zhang

Chen

et al. 2014

CrystEngComm

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“…For example, RbSm 3 F 10 (based on the larger Sm 3+ ion) crystallizes in the cubic phase, while RbGd 3 F 10 (and smaller rare earth ions paired with Rb) crystallizes in the hexagonal phase. For RbSm 3 F 10 , this is consistent with what is reported for polycrystalline material prepared by solid-state techniques (Chamberlain & Corruccini, 2006), and correlates with the single-crystal structure reported for RbEu 3 F 10 also obtained by solid-state techniques (Arbus et al, 1980). However, in the case of RbGd 3 F 10 , differences in the synthetic method appear to contribute to the synthesis of hexagonal single crystals in the present hydrothermal study compared with cubic powders prepared by solid-state methods (Chamberlain & Corruccini, 2003).…”

Section: The Are 3 F 10 Systemsupporting

confidence: 90%

Crystal chemistry of hydrothermally grown ternary alkali rare earth fluorides

McMillen

Comer

Fulle

et al. 2015

Acta Crystallogr Sect B

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The structural variations of several alkali metal rare earth fluoride single crystals are summarized. Two different stoichiometric formulations are considered, namely those of ARE2F7 and ARE3F10 (A = K, Rb, Cs; RE = Y, La-Lu), over a wide range of ionic radii of both the alkali and rare earth (RE) ions. Previously reported and several new single-crystal structures are considered. The new single crystals are grown using hydrothermal methods and the structures are compared with literature reports of structures grown from both melts and hydrothermal fluids. The data reported here are combined with the literature data to gain a greater understanding of structural subtleties surrounding these systems. The work underscores the importance of the size of the cations to the observed structure type and also introduces synthetic technique as a contributor to the same. New insights based on single-crystal structure analysis in the work introduce a new disordered structure type in the case of ARE2F7, and examine the trends and boundaries of the ARE3F10 stoichiometry. Such fundamental structural information is useful in understanding the potential applications of these compounds as optical materials.

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“…Compared to the Eu 0.95 Tb 0.05 F 3 sample (curve a), the peaks of the Eu 3d 5/2 spectrum for the samples with a high Tb 3+ content show a small negative shift, which suggests the difference of the complexation state and the crystal field of the fluoride matrix. Since the bonds of Ln-F in LnF 3 are different with those of NH 4 Ln 3 F 10 , [55][56][57][58][59] the small negative shift of Eu 3d 5/2 can be indexed to the more electron cloud drain from the Eu 3+ to F 2 due to the shorter bonds of Eu-F. Consistent with this, the Tb 3d 5/2 spectrum of the samples with a high Eu content reveals a negative shift toward lower binding energy compared to those of the NH 4 Eu 1.5 Tb 1.5 F 10 sample (curve d).…”

Section: Resultsmentioning

confidence: 99%

Self-assembled hollow rare earth fluoride alloyed architectures with controlled crystal phase and morphology

et al. 2012

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A general synthetic protocol has been developed to assemble EuF 3 :Ln 3+ and EuF 3 :Ln 3+ /NH 4 + (Ln = Y, Gd, Tb, Dy, Ho, Er, and Tm) alloyed nanocrystallites into hexagon-shaped sub-microcages and hollow sub-microspheres. The structure, morphology and growth kinetics of the alloyed crystallites are investigated. Based on the results obtained by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectra (XPS), it is proposed that the possible formation mechanisms for EuF 3 :Ln 3+ and EuF 3 :Ln 3+ /NH 4 + (Ln = Y, Gd, Tb, Dy, Ho, Er, and Tm)alloyed architectures involves a crystal-phase-mediated self-assembly process. The crystal structure and morphology are strongly influenced by the Eu/Ln feed molar ratio in the starting solution. A higher feed ratio of Eu to Ln facilitates the growth of hexagonal EuF 3 :Ln 3+ (Ln = Y, Gd, Tb, Dy, Ho, Er, and Tm) alloyed crystallites and results in the formation of hexagon-shaped sub-microcages, while a lower feed ratio of Eu to Ln accelerates the growth of cubic NH 4 Ln 3 F 10 :Eu 3+ (Ln = Y, Gd, Tb, Dy, Ho, Er, and Tm) alloyed crystallites and leads to the assembly of the alloyed nanocrystals into hollow sub-microspheres. Additionally, the as-synthesized alloyed architectures show good performance in highly efficient fluorescent host materials.

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Structure cristalline du composé RbEu3F10

Cited by 16 publications

References 13 publications

Controllable synthesis of NH₄Eu₃F₁₀nanospheres and application in bioimaging

Controllable synthesis of NH₄Eu₃F₁₀nanospheres and application in bioimaging

Crystal chemistry of hydrothermally grown ternary alkali rare earth fluorides

Self-assembled hollow rare earth fluoride alloyed architectures with controlled crystal phase and morphology

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Structure cristalline du composé RbEu3F10

Cited by 16 publications

References 13 publications

Controllable synthesis of NH4Eu3F10nanospheres and application in bioimaging

Controllable synthesis of NH4Eu3F10nanospheres and application in bioimaging

Crystal chemistry of hydrothermally grown ternary alkali rare earth fluorides

Self-assembled hollow rare earth fluoride alloyed architectures with controlled crystal phase and morphology

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Product

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Controllable synthesis of NH₄Eu₃F₁₀nanospheres and application in bioimaging

Controllable synthesis of NH₄Eu₃F₁₀nanospheres and application in bioimaging