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Optical Properties of Molybdates Containing a Combination of Rare-Earth Elements

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Inorganic Materials Aims and scope

Abstract—

We have synthesized new molybdates, Cs2LnZrTi(MoO4)6.5 (Ln = Eu + Yb, Eu + Dy, and Gd + Dy lanthanides), containing pairs of rare-earth elements in the ratio 1 : 1. The synthesized compounds have been shown to be single-phase and isostructural with each other. We have determined their crystallographic characteristics and assessed their thermal stability. In the dysprosium-containing molybdates, the Dy3+ luminescence intensity is low as a result of concentration quenching. The molybdate containing the Eu + Dy pair of rare-earth elements shows predominant high-intensity luminescence in the red spectral region. In addition to usual infrared emission due to ytterbium, the Eu + Yb compound demonstrates emission in the ultraviolet spectral region. We have measured luminescence decay kinetic characteristics at the peak emission wavelengths. In the case of the molybdate containing the Eu + Yb pair of rare-earth elements, energy transfer from europium ions to ytterbium has been observed. We have demonstrated high-intensity luminescence that can be excited both on intraconfigurational transitions and in the region of charge transfer bands of oxygen–molybdenum complexes.

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ACKNOWLEDGMENTS

In this work, we used equipment at the Shared Research Facilities Center, Buryat Scientific Center, Siberian Branch, Russian Academy of Sciences, and at the Shared Isotope Geochemistry Research Facilities Center, Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences.

Funding

This work was supported by the Russian Federation Ministry of Science and Higher Education (state research target for the Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, project no. 0273-2021-0008) and in part by the Russian Foundation for Basic Research (grant nos. 18-08-00799 and 18-03-00557).

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Authors and Affiliations

  1. Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, 670047, Ulan-Ude, Buryat Republic, Russia

    S. G. Dorzhieva, B. G. Bazarov & J. G. Bazarova

  2. Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences, 664033, Irkutsk, Russia

    D. O. Sofich & R. Yu Shendrik

Authors
  1. S. G. Dorzhieva
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  2. D. O. Sofich
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  3. B. G. Bazarov
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  4. R. Yu Shendrik
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  5. J. G. Bazarova
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Correspondence to S. G. Dorzhieva.

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Translated by O. Tsarev

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Dorzhieva, S.G., Sofich, D.O., Bazarov, B.G. et al. Optical Properties of Molybdates Containing a Combination of Rare-Earth Elements. Inorg Mater 57, 54–59 (2021). https://doi.org/10.1134/S0020168521010040

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