Coexistence of Tellurium Cations and Anions in Phosphonium‐Based Ionic Liquids
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Elemental tellurium readily dissolves in ionic liquids (ILs) based on tetraalkylphosphonium cations even at temperatures below 100 °C. In the case of ILs with acetate, decanoate, or dicyanamide anions, dark red to purple colored solutions form. A study combining NMR, UV-Vis and Raman spectroscopy revealed the formation of tellurium anions (Te n) 2− with chain lengths up to at least n=5, which are in dynamic equilibrium with each other. Since external influences could be excluded and no evidence of an ionic liquid reaction was found, disproportionation of the tellurium is the only possible dissolution mechanism. Although the spectroscopic detection of tellurium cations in these solutions is difficult, the coexistence of tellurium cations, such as (Te 4) 2+ and (Te 6) 4+, and tellurium anions could be proven by cyclic voltammetry and electrodeposition experiments. DFT calculations indicate that electrostatic interactions with the ions of the ILs are sufficient to stabilize both types of tellurium ions in solution.
Details
Original language | English |
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Article number | e202103770 |
Journal | Chemistry - A European Journal |
Volume | 28 |
Issue number | 7 |
Publication status | Published - Feb 2022 |
Peer-reviewed | Yes |
External IDs
Scopus | 85122015988 |
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WOS | 000884765800013 |
PubMed | 34890100 |
Mendeley | 21e2c8ef-df0e-386a-a729-cf2dd2145b9a |
ORCID | /0000-0001-7523-9313/work/142238562 |
ORCID | /0000-0002-2391-6025/work/142250185 |
Keywords
Research priority areas of TU Dresden
DFG Classification of Subject Areas according to Review Boards
Subject groups, research areas, subject areas according to Destatis
Sustainable Development Goals
ASJC Scopus subject areas
Keywords
- Te-125 NMR spectroscopy, Ionic liquids, Tellurides, Tellurium, Tellurium cations