Schmidt, Moritz; Heck, Stephanie; Bosbach, Dirk; Ganschow, Steffen; Walther, Clemens; Stumpf, Thorsten: Characterization of powellite-based solid solutions by site-selective time resolved laser fluorescence spectroscopy. In: Dalton Transactions 42 (2013), Nr. 23, S. 8387-8393. DOI:
http://dx.doi.org/10.1039/C3DT50146A
Zusammenfassung: |
We present a comprehensive study of the solid solution system Ca-2(MoO4)(2)-NaGd(MoO4)(2) on the molecular scale, by means of site-selective time resolved laser fluorescence spectroscopy (TRLFS). Eu3+ is used as a trace fluorescent probe, homogeneously substituting for Gd3+ in the solid solution crystal structure. Site-selective TRLFS of a series of polycrystalline samples covering the whole composition range of the solid solution series from 10% substitution of Ca2+ to the NaGd end-member reveals it to be homogeneous throughout the whole range. The trivalent ions are incorporated into the powellite structure in only one coordination environment, which exhibits a very strong ligand-metal interaction. Polarization-dependent measurements of a single crystal of NaGd(Eu)(MoO4)(2) identify the coordination geometry to be of C-2v point symmetry. The S-4 symmetry of the Ca site within the powellite lattice can be transformed into C-2v assuming minor motion in the first coordination sphere.
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Lizenzbestimmungen: |
CC BY 3.0 Unported - http://creativecommons.org/licenses/by/3.0/
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Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2013 |
Schlagwörter (englisch): |
europium(III) luminescence, transition frequency, complexes, glass, lanthanide, eu(iii), system, chemistry, ceramics, number
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Fachliche Zuordnung (DDC): |
540 | Chemie
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