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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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 Urheber:
Grasser, Matthias A.1, Autor
Pietsch, Tobias1, Autor
Blasius, Jan1, Autor
Hollóczki, Oldamur1, Autor
Brunner, Eike1, Autor
Doert, Thomas1, Autor
Ruck, Michael2, Autor           
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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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2021
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 000734951900001
DOI: 10.1002/chem.202103770
 Art des Abschluß: -

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Titel: Chemistry – A European Journal
  Andere : Chem. – Eur. J.
  Andere : Chem. Eur. J.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Weinheim : Wiley-VCH
Seiten: - Band / Heft: - Artikelnummer: e202103770 Start- / Endseite: 1 - 11 Identifikator: ISSN: 0947-6539
CoNE: https://pure.mpg.de/cone/journals/resource/954926979058