Low Temperature Activation of Tellurium and Resource-Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids

Grasser MA, Pietsch T, Brunner E, Doert T, Ruck M (2021)

Publication Type: Journal article

Publication year: 2021

Journal

ChemistryOpen Wiley Open Access: Chemistry Open / Wiley

Book Volume: 10

Pages Range: 117-124

Journal Issue: 2

DOI: 10.1002/open.202000249

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.

Involved external institutions

Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Grasser, M.A., Pietsch, T., Brunner, E., Doert, T., & Ruck, M. (2021). Low Temperature Activation of Tellurium and Resource-Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids. ChemistryOpen, 10(2), 117-124. https://dx.doi.org/10.1002/open.202000249

MLA:

Grasser, Matthias A., et al. "Low Temperature Activation of Tellurium and Resource-Efficient Synthesis of AuTe2 and Ag2Te in Ionic Liquids." ChemistryOpen 10.2 (2021): 117-124.

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