Processing Gray Selenium in Phosphonium-Based Ionic Liquids
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
The dissolution of gray selenium in tetraalkylphosphonium acetate ionic liquids was investigated by UV-vis, NMR, and Raman spectroscopy as well as quantum chemical calculations and electrochemical methods. Acetate anions and tetraalkylphosphonium cations facilitate the formation and stabilization of oligoselenides Sen2- and cationic Se species in the ionic liquid phase. Chemical exchange of selenium atoms was demonstrated by variable-temperature 77Se NMR experiments. Additionally, uncharged cycloselenium molecules exist at high selenium concentrations. Upon dilution with ethanol, amorphous red selenium precipitates from the solution. Moreover, crystalline Se1-xTex solid solutions precipitate when elemental tellurium is added to the mixture as confirmed by powder X-ray diffraction and Raman spectroscopy.
Details
Original language | English |
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Pages (from-to) | 1667-1678 |
Number of pages | 12 |
Journal | Inorganic chemistry |
Volume | 62 |
Issue number | 4 |
Publication status | Published - 30 Jan 2023 |
Peer-reviewed | Yes |
External IDs
PubMed | 36651698 |
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ORCID | /0000-0002-2391-6025/work/159171909 |