Hydrophobic bis(trifluoromethylsulfonyl)imide based ionic liquids pyrolysis : through the window of the ultrasonic reactor

Gregory Chatel 1, 2 Rachel Pflieger 3 E. Naffrechoux 1 Sergey I. Nikitenko 3 Joël Suptil 1 Catherine Goux-Henry 2 N. Kardos 1 Bruno Andrioletti 2, * M. Draye 1, *
* Corresponding author
2 CASYEN - Catalyse Synthèse et Environnement
ICBMS - Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
3 LSFC - Sonochimie dans les Fluides Complexes
ICSM - UMR 5257 - Institut de Chimie Séparative de Marcoule
Abstract : There are typically signs of light degradation of ionic liquids by pyrolysis when used in electrochemistry or when submitted to high heat or to ultrasound irradiation for chemical reactions. Cavitation observed through sonoluminescence from dry hydrophobic ionic liquids under sonication leads to degradation by pyrolysis at the level of traces. The degradation products can hinder recycling ionic liquids and, in turn, hinder the beneficial of their use and development of efficient large-scale processes. Unfortunately, various experimental limitations have prevented structural determination. The problems include the following: ionic liquids are almost non-volatile, which excludes the use of classical analytical techniques, and degradation products are produced at very low concentrations, which complicates extraction and analysis. Reported here is the first structural determination of the degradation products of a hydrophobic bis(trifluoromethylsulfonyl)imide-based ionic liquid under ultrasonic irradiation.
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Journal articles
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https://hal.archives-ouvertes.fr/hal-01179497
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Submitted on : Wednesday, July 22, 2015 - 4:09:32 PM
Last modification on : Wednesday, May 22, 2019 - 4:24:07 PM

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Gregory Chatel, Rachel Pflieger, E. Naffrechoux, Sergey I. Nikitenko, Joël Suptil, et al.. Hydrophobic bis(trifluoromethylsulfonyl)imide based ionic liquids pyrolysis : through the window of the ultrasonic reactor. ACS Sustainable Chemistry & Engineering, American Chemical Society, 2013, 1 (1), pp.137-143. ⟨10.1021/sc300068d⟩. ⟨hal-01179497⟩

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