Figure 2.
Figure 2. Experimental estimates of selectivity free energy, ΔΔG=ΔGK→Na−ΔGK→Nabulk, for different organic solvents with respect to bulk liquid water (Cox and Parker, 1973; Marcus, 1983; Schmid et al., 2000; Yu et al., 2010a). For these estimates, GX=(∂G/∂nX)T,P is the partial molar Gibbs free energy for ion X in the specified medium relative to an ideal standard state, so that ΔG vanishes when ion–medium interactions vanish.

Experimental estimates of selectivity free energy, ΔΔG=ΔGK→Na−ΔGK→Nabulk, for different organic solvents with respect to bulk liquid water (Cox and Parker, 1973; Marcus, 1983; Schmid et al., 2000; Yu et al., 2010a). For these estimates, GX=(∂G/∂nX)T,P is the partial molar Gibbs free energy for ion X in the specified medium relative to an ideal standard state, so that ΔG vanishes when ion–medium interactions vanish.

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