Processing Gray Selenium in Phosphonium-Based Ionic Liquids

Pietsch T, Blasius J, Richter J, Grasser MA, Holloczki O, Wollmann P, Weidinger IM, Ruck M, Brunner E (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Inorganic Chemistry American Chemical Society

Book Volume: 62

Pages Range: 1667-1678

Journal Issue: 4

DOI: 10.1021/acs.inorgchem.2c04094

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 Sen^2- 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.

Involved external institutions

Technische Universität Dresden

Germany (DE) Rheinische Friedrich-Wilhelms-Universität Bonn

Germany (DE) University of Debrecen / Debreceni Egyetem

Hungary (HU)

How to cite

APA:

Pietsch, T., Blasius, J., Richter, J., Grasser, M.A., Holloczki, O., Wollmann, P.,... Brunner, E. (2023). Processing Gray Selenium in Phosphonium-Based Ionic Liquids. Inorganic Chemistry, 62(4), 1667-1678. https://dx.doi.org/10.1021/acs.inorgchem.2c04094

MLA:

Pietsch, Tobias, et al. "Processing Gray Selenium in Phosphonium-Based Ionic Liquids." Inorganic Chemistry 62.4 (2023): 1667-1678.

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