Initial dissolution of D2O at the gas–liquid interface of the ionic liquid [C4min][NTf2] associated with hydrogen-bond network formation
文献情報
H. Ohoyama, T. Teramoto
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.
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