Ultrasonic Properties of Hydrophobic Bis(trifluoromethylsulfonyl)imide-Based Ionic Liquids

Energy conversion in sonochemistry is known to be an important factor for understanding the mechanism of chemical reactions. However, ultrasound characteristics are dependent on the physical properties of the liquid medium. This work describes specific heat capacities (cp ) of five hydrophobic bis(t...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2012-12, Vol.57 (12), p.3385-3390
Main Authors: Chatel, Gregory, Leclerc, Laurent, Naffrechoux, Emmanuel, Bas, Corine, Kardos, Nathalie, Goux-Henry, Catherine, Andrioletti, Bruno, Draye, Micheline
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemical Sciences
Organic chemistry
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Summary:Energy conversion in sonochemistry is known to be an important factor for understanding the mechanism of chemical reactions. However, ultrasound characteristics are dependent on the physical properties of the liquid medium. This work describes specific heat capacities (cp ) of five hydrophobic bis(trifluoromethylsulfonyl)imide based ionic liquids ([C8mpyrr][NTf2], [C4mpyrr][NTf2], [C8epip][NTf2], [C8mim][NTf2], [C8mpy][NTf2]) and, for the first time, the acoustic power when they are submitted to ultrasound at two selected electric powers. The behavior of ultrasound in ionic liquids is then compared to the one in water. Despite the difference in cp values, the measured acoustic powers are very similar for both media. Indeed, ionic liquids heat up faster than water, and this can lead to interesting effects when using ionic liquids as solvents in organic chemistry.
ISSN:0021-9568
1520-5134
DOI:10.1021/je300377a