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- Title
Formation of Crystalline Telluridomercurates from Ionic Liquids near Room Temperature.
- Authors
Donsbach, Carsten; Dehnen, Stefanie
- Abstract
The ternary telluridomercurate Na2[HgTe2] ( 1) was formed by fusion of Na2Te and HgTe at 600 °C and further treated in the ionic liquid (C4C1Im)[BF4] (C4C1Im = 1-butyl-3-methylimidazolium) at moderately elevated temperatures (60 °C), leading to replacement of the Na+ cations with (C4C1Im)+ and re-arrangement of the inorganic substructure. As a result, we obtained the telluridomercurate (C4C1Im)2[HgTe2] ( 2) and the tellurido/ditelluridomercurate (C4C1Im)2[Hg2Te4] ( 3) besides polytellurides and HgTe as by-products. The heavy atom compositions of the compounds were confirmed by micro X-ray fluorescence spectroscopy (μ-XFS), and their structures were determined by single-crystal diffraction. The cation-exchanged salts were further investigated by UV/Vis spectroscopy, indicating narrow band-gap optical transitions at 2.80 eV ( 2) and 1.63 eV ( 3), in agreement with their visible yellow or reddish-black color, respectively.
- Subjects
TELLURIDES; IONIC liquids; TEMPERATURE effect; ION exchange (Chemistry); CRYSTAL structure
- Publication
Zeitschrift für Anorganische und Allgemeine Chemie, 2017, Vol 643, Issue 1, p14
- ISSN
0044-2313
- Publication type
Article
- DOI
10.1002/zaac.201600338