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Blue Excitement: The Lanthanide(III) Chloride Oxidomolybdates(VI) Ln(3)Cl(3)[MoO6] (Ln = La, Pr, and Nd) and Their Spectroscopic Properties
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). University of Stuttgart, Germany.ORCID iD: 0000-0002-9284-5101
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Number of Authors: 52019 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 58, no 13, p. 8308-8315Article in journal (Refereed) Published
Abstract [en]

The lanthanide(III) chloride oxidomolybdates(VI) with the empirical formula Ln(3)Cl(3)[MoO6] (Ln = La, Pr, and Nd) were synthesized by solid-state reactions utilizing the respective lanthanide trichloride, lanthanide sesquioxide (where available), and molybdenum trioxide together with lithium chloride as a fluxing agent. The title compounds crystallize in hexagonal space group P6(3)/m (a = 942-926 pm, c = 542-533 pm, Z = 2). Besides tetracapped trigonal prismatically coordinated Ln(3+) cations, noncondensed trigonal prismatic [MoO6]6(-) entities are found in the crystal structure. In addition to X-ray diffraction, the title compounds were also characterized by single-crystal Raman and infrared spectroscopy as well as measurements to determine their magnetic susceptibility and behavior at low temperatures. The most outstanding properties of the Ln(3)Cl(3)[MoO6] representatives (Ln = La, Pr, and Nd), however, are of an optical nature, because their band gaps, determined by diffuse reflectance spectroscopy, show a significant shift toward lower energies compared to those of other rare-earth metal chloride molybdates with a different polyhedral arrangement. This culminates in La3Cl3[MoO6]:Eu3+ exhibiting luminescence, which can be excited in the visible range of the electromagnetic spectrum by a blue light-emitting diode.

Place, publisher, year, edition, pages
2019. Vol. 58, no 13, p. 8308-8315
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Chemical Sciences
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URN: urn:nbn:se:su:diva-172026DOI: 10.1021/acs.inorgchem.9b00098ISI: 000474475800010PubMedID: 31247851OAI: oai:DiVA.org:su-172026DiVA, id: diva2:1346327
Available from: 2019-08-27 Created: 2019-08-27 Last updated: 2019-08-27Bibliographically approved

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