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Issue 40, 2016
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Initial dissolution of D2O at the gas–liquid interface of the ionic liquid [C4min][NTf2] associated with hydrogen-bond network formation

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Abstract

We have studied the initial dissolution of D2O at the interfacial surface of the flowing jet sheet beam of the ionic liquid (IL) [C4min][NTf2] using the King and Wells method as a function of both the temperature and collision energy of the IL. The initial dissolution probability of D2O into the IL [C4min][NTf2] was found to follow the general propensity that the solubility of gases into a liquid decreases with temperature. However, a large partial molar enthalpy and entropy for the initial dissolution of D2O in the IL [C4min][NTf2] were observed from the temperature dependence of the initial dissolution probability: ΔHl = −53 ± 8 kJ mol−1, ΔSl = −210 ± 30 J mol−1 K−1. In addition, it was found that the collision energy significantly reduced the initial dissolution probability. We propose that the associated D2O molecules at the interface of the IL [C4min][NTf2] make a hydrogen-bond network around the [NTf2] anion before dissolution into the deeper portion of the interface layer.

Graphical abstract: Initial dissolution of D2O at the gas–liquid interface of the ionic liquid [C4min][NTf2] associated with hydrogen-bond network formation

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Article information


Submitted
20 May 2016
Accepted
26 Sep 2016
First published
26 Sep 2016

Phys. Chem. Chem. Phys., 2016,18, 28061-28068
Article type
Paper

Initial dissolution of D2O at the gas–liquid interface of the ionic liquid [C4min][NTf2] associated with hydrogen-bond network formation

H. Ohoyama and T. Teramoto, Phys. Chem. Chem. Phys., 2016, 18, 28061
DOI: 10.1039/C6CP03448A

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