Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids
Abstract The low temperature syntheses of AuTe2 and Ag2Te starting from the elements were investigated in the ionic liquids (ILs) [BMIm]X and [P66614]Z ([BMIm]+=1‐butyl‐3‐methylimidazolium; X = Cl, [HSO4]−, [P66614]+ = trihexyltetradecylphosphonium; Z = Cl−, Br−, dicyanamide [DCA]−, bis(trifluoromet...
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doaj-e237b72cd6824096aa2278f92f92a7722021-03-10T10:24:31ZengWiley-VCHChemistryOpen2191-13632021-02-0110211712410.1002/open.202000249Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic LiquidsMatthias A. Grasser0Tobias Pietsch1Prof. Dr. Eike Brunner2Prof. Dr. Thomas Doert3Prof. Dr. Michael Ruck4Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyFaculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyFaculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyFaculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyFaculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyAbstract The low temperature syntheses of AuTe2 and Ag2Te starting from the elements were investigated in the ionic liquids (ILs) [BMIm]X and [P66614]Z ([BMIm]+=1‐butyl‐3‐methylimidazolium; X = Cl, [HSO4]−, [P66614]+ = trihexyltetradecylphosphonium; Z = Cl−, Br−, dicyanamide [DCA]−, bis(trifluoromethylsulfonyl)imide [NTf2]−, decanoate [dec]−, acetate [OAc]−, bis(2,4,4‐trimethylpentyl)phosphinate [BTMP]−). Powder X‐ray diffraction, scanning electron microscopy, and energy‐dispersive X‐ray spectroscopy revealed that [P66614]Cl is the most promising candidate for the single phase synthesis of AuTe2 at 200 °C. Ag2Te was obtained using the same ILs by reducing the temperature in the flask to 60 °C. Even at room temperature, quantitative yield was achieved by using either 2 mol % of [P66614]Cl in dichloromethane or a planetary ball mill. Diffusion experiments, 31P and 125Te‐NMR, and mass spectroscopy revealed one of the reaction mechanisms at 60 °C. Catalytic amounts of alkylphosphanes in commercial [P66614]Cl activate tellurium and form soluble phosphane tellurides, which react on the metal surface to solid telluride and the initial phosphane. In addition, a convenient method for the purification of [P66614]Cl was developed.https://doi.org/10.1002/open.202000249ionic liquidpurification of ionic liquidssilver telluride, tellurium125Te-NMR |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Matthias A. Grasser Tobias Pietsch Prof. Dr. Eike Brunner Prof. Dr. Thomas Doert Prof. Dr. Michael Ruck |
spellingShingle |
Matthias A. Grasser Tobias Pietsch Prof. Dr. Eike Brunner Prof. Dr. Thomas Doert Prof. Dr. Michael Ruck Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids ChemistryOpen ionic liquid purification of ionic liquids silver telluride, tellurium 125Te-NMR |
author_facet |
Matthias A. Grasser Tobias Pietsch Prof. Dr. Eike Brunner Prof. Dr. Thomas Doert Prof. Dr. Michael Ruck |
author_sort |
Matthias A. Grasser |
title |
Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids |
title_short |
Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids |
title_full |
Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids |
title_fullStr |
Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids |
title_full_unstemmed |
Low Temperature Activation of Tellurium and Resource‐Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids |
title_sort |
low temperature activation of tellurium and resource‐efficient synthesis of aute2 and ag2te in ionic liquids |
publisher |
Wiley-VCH |
series |
ChemistryOpen |
issn |
2191-1363 |
publishDate |
2021-02-01 |
description |
Abstract The low temperature syntheses of AuTe2 and Ag2Te starting from the elements were investigated in the ionic liquids (ILs) [BMIm]X and [P66614]Z ([BMIm]+=1‐butyl‐3‐methylimidazolium; X = Cl, [HSO4]−, [P66614]+ = trihexyltetradecylphosphonium; Z = Cl−, Br−, dicyanamide [DCA]−, bis(trifluoromethylsulfonyl)imide [NTf2]−, decanoate [dec]−, acetate [OAc]−, bis(2,4,4‐trimethylpentyl)phosphinate [BTMP]−). Powder X‐ray diffraction, scanning electron microscopy, and energy‐dispersive X‐ray spectroscopy revealed that [P66614]Cl is the most promising candidate for the single phase synthesis of AuTe2 at 200 °C. Ag2Te was obtained using the same ILs by reducing the temperature in the flask to 60 °C. Even at room temperature, quantitative yield was achieved by using either 2 mol % of [P66614]Cl in dichloromethane or a planetary ball mill. Diffusion experiments, 31P and 125Te‐NMR, and mass spectroscopy revealed one of the reaction mechanisms at 60 °C. Catalytic amounts of alkylphosphanes in commercial [P66614]Cl activate tellurium and form soluble phosphane tellurides, which react on the metal surface to solid telluride and the initial phosphane. In addition, a convenient method for the purification of [P66614]Cl was developed. |
topic |
ionic liquid purification of ionic liquids silver telluride, tellurium 125Te-NMR |
url |
https://doi.org/10.1002/open.202000249 |
work_keys_str_mv |
AT matthiasagrasser lowtemperatureactivationoftelluriumandresourceefficientsynthesisofaute2andag2teinionicliquids AT tobiaspietsch lowtemperatureactivationoftelluriumandresourceefficientsynthesisofaute2andag2teinionicliquids AT profdreikebrunner lowtemperatureactivationoftelluriumandresourceefficientsynthesisofaute2andag2teinionicliquids AT profdrthomasdoert lowtemperatureactivationoftelluriumandresourceefficientsynthesisofaute2andag2teinionicliquids AT profdrmichaelruck lowtemperatureactivationoftelluriumandresourceefficientsynthesisofaute2andag2teinionicliquids |
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1724226868355268608 |