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  Coexistence of Tellurium Cations and Anions in Phosphonium-Based Ionic Liquids

Grasser, M. A., Pietsch, T., Blasius, J., Hollóczki, O., Brunner, E., Doert, T., et al. (2021). Coexistence of Tellurium Cations and Anions in Phosphonium-Based Ionic Liquids. Chemistry – A European Journal, e202103770, pp. 1-11. doi:10.1002/chem.202103770.

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 Creators:
Grasser, Matthias A.1, Author
Pietsch, Tobias1, Author
Blasius, Jan1, Author
Hollóczki, Oldamur1, Author
Brunner, Eike1, Author
Doert, Thomas1, Author
Ruck, Michael2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863444              

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 Abstract: Elemental tellurium readily dissolves in ionic liquids (ILs) based on tetraalkylphosphonium cations even at temperatures below 100 degrees 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.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000734951900001
DOI: 10.1002/chem.202103770
 Degree: -

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Title: Chemistry – A European Journal
  Other : Chem. – Eur. J.
  Other : Chem. Eur. J.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: e202103770 Start / End Page: 1 - 11 Identifier: ISSN: 0947-6539
CoNE: https://pure.mpg.de/cone/journals/resource/954926979058