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Structural and spectroscopic investigations on the quenching free luminescence of europium oxalate nanocrystals
The structural features leading to the intense quenching free luminescence exhibited by europium oxalate nanocrystals, poly[[hexaaquatri‐μ2‐oxalato‐dieuropium] 4.34‐hydrate], {[Eu2(C2O4)3(H2O)6]·4.34H2O}n, is the focal point of this report. Europium oxalate nanocrystals were synthesized by a simple...
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Published in: | Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2019-05, Vol.75 (5), p.589-597 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The structural features leading to the intense quenching free luminescence exhibited by europium oxalate nanocrystals, poly[[hexaaquatri‐μ2‐oxalato‐dieuropium] 4.34‐hydrate], {[Eu2(C2O4)3(H2O)6]·4.34H2O}n, is the focal point of this report. Europium oxalate nanocrystals were synthesized by a simple microwave‐assisted co‐precipitation method. Powder X‐ray diffraction analysis revealed the monoclinic structure of the nanocrystals and the phase purity. The morphology and particle size were examined by transmission electron microscopy (TEM) analysis. Luminescence measurements on a series of samples of La2–xEux(C2O4)3·10H2O, with x varying in the range 0.1 to 2, established the quenching free nature exhibited by the europium oxalate nanocrystals. A single‐crystal structure analysis was carried out and the quenching free luminescence is explained on the basis of the crystal structure. A detailed photoluminescence characterization was carried out using excitation and emission studies, decay analysis, and CIE coordinate and colour purity evaluation. The various spectroscopic parameters were evaluated by Judd–Ofelt theoretical analysis and the results are discussed on the basis of the crystal structure analysis.
The structural features leading to the intense quenching free luminescence exhibited by europium oxalate nanocrystals is the focal point of this report. The various spectroscopic parameters were evaluated by Judd–Ofelt theoretical analysis and the results are discussed on the basis of crystal structure analysis. |
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ISSN: | 2053-2296 0108-2701 2053-2296 1600-5759 |
DOI: | 10.1107/S2053229619005059 |