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http://dx.doi.org/10.18419/opus-13542
Autor(en): | Knies, Benjamin Hartenbach, Ingo |
Titel: | Oxygen out, sulfur in : the alkali metal sulfidotungstates K2[WS4] and novel Na2[WS4] ⋅ 4 H2O |
Erscheinungsdatum: | 2022 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 7 |
Erschienen in: | Zeitschrift für anorganische und allgemeine Chemie 648 (2023), No. e202200270 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-135615 http://elib.uni-stuttgart.de/handle/11682/13561 http://dx.doi.org/10.18419/opus-13542 |
ISSN: | 1521-3749 0044-2313 |
Zusammenfassung: | An attempt to synthesize a holmium sulfidotungstate using potassium polysulfides as reactive flux resulted in orange single crystals of K2[WS4], isotypic to K2[MoS4] (orthorhombic; Pnma; a=935.10(3), b=694.22(2), c=1221.85(4) pm; Z=4). A similar attempt to obtain a neodymium sulfidotungstate with sodium polysulfide yielded a violet substance, which underwent hydrolysis yielding orange‐yellow single crystals of Na2[WS4] ⋅ 4 H2O (monoclinic, C2/c, a=1098.08(4), b=904.46(3), c=1144.27(4) pm, β=101.577(3)°, Z=4). Further attempts to synthesize these products deliberately as single phase materials only proved to be successful for K2[WS4] but not for Na2[WS4] ⋅ 4 H2O. Both compounds contain non‐condensed [WS4]2− tetrahedra, which surround the alkali metal cations with coordination numbers of nine and eight in K2[WS4]. In Na2[WS4] ⋅ 4 H2O, the sodium cations are coordinated by two sulfide anions plus four water molecules, resulting in a coordination number of six. Besides crystal structure determination, infrared and single crystal Raman spectra were collected and the optical band gap of K2[WS4] was determined. |
Enthalten in den Sammlungen: | 03 Fakultät Chemie |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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ZAAC_ZAAC202200270.pdf | 1,27 MB | Adobe PDF | Öffnen/Anzeigen |
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