Table 1.

Na⁺ Selectivity Coefficients of Ionophore 1

${\mathrm{J}}^{z_{\mathrm{J}}}$	$\log K_{\mathrm{Na},\mathrm{J}}^{\mathrm{vol}}$	$\log K_{\mathrm{Na},\mathrm{J}}^{\mathrm{therm}}$	$\log (K_{\mathrm{Na},\mathrm{J}}^{\mathrm{vol}}/K_{\mathrm{Na},\mathrm{J}}^{\mathrm{therm}})$
Li+a	−4.13 ± 0.04	−4.13 ± 0.02	0.00 ± 0.05
K+b	−2.9 ± 0.3	−2.9 ± 0.2	0.0 ± 0.4
Ca2+c	−8.1 ± 0.2	−5.0 ± 0.2	−3.1 ± 0.3
Sr2+c	−8.10 ± 0.05	−6.19 ± 0.09	−1.9 ± 0.1
Ba2+c	−7.70 ± 0.09	−6.89 ± 0.06	−0.8 ± 0.1

^aN = 4.

^bN = 6.

^cN = 4.