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Processing Gray Selenium in Phosphonium-Based Ionic Liquids

delete2023-01-18
delete0
PRE
AI
T
Tobias Pietsch
J
Jan Blasius
J
Janine Richter
M
Matthias A. Grasser
O
Oldamur Hollóczki
P
Philipp Wollmann
I
Inez M. Weidinger
M
Michael Ruck *
E
Eike Brunner *
DOI：10.1021/acs.inorgchem.2c04094delete
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Abstract

Abstract

En 中文
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.
Keywords:
SE-77 NMR-SPECTROSCOPY
AMORPHOUS SELENIUM
CRYSTAL-STRUCTURE
POLYSELENIDE ELECTROLYTES
CRYSTALLIZATION KINETICS
POLYATOMIC CATIONS
SE
TELLURIUM
TE
SPECTRA

Journal

Inorganic Chemistry cover
Inorganic Chemistry
IF:
4.7
Papers:
4.9W
Citations:
10.5W

Organization

U
university of bonn
Scholars:
3.3W
Papers: 2.6W
Citations: 29
U
University of Debrecen
Scholars:
1.0W
Papers: 7.0K
Citations: 6.3K
T
Technische Universitat Dresden
Scholars:
3.2W
Papers: 2.5W
Citations: 249
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