Ion-Selective Electrodes Based on Surface-Active Ionophores

共振光学第二谐波生成（共振光学SHG）在样本解决方案和液体薄膜之间的界面上，以不同表面活性的离子体为基础，可以按顺序测量离子体对离子体电荷分离的影响，以调查离子体表面活性的离子体。作为具有不同表面活性的离子体，但接受相同的冠以太活力作为Na-D1+-D1 ion， 4'-（p-octadecylbenzoateazo）phenoxymethyl-15-crown-5（1）和4'-（p-methylbenzoateazo）phenoxymethyl-15-crown-5（2）已合成。SHG强度对事件激光光的极化角度的依赖性显示了离子体1和2的平均分子方向几乎等于彼此。When the concentration of Na-D1+-D1 ion in the aqueous sample solutions increased， increases in the SHG intensities were observed for both membranes based on ionophores 1 and 2. However，SHG基于ionophore 1的强度更强，建议ionophore 1的表面活动高于ionophore 2的表面活动。基于离子体1的膜与Aqueous Na D1+离子体D1离子体解决方案的变化在相位边界潜力的变化中找到了比离子体2更大的薄膜。对Na-D1+ D1离子的潜在测量检测限制的改进也适用于基于表面活性离子体1的膜。这些结果演示了在液体/液体接口上充电分离的范围，如由主离子复合体观察到的共振SHG，并由使用表面活性离子体增加。

Resonant optical second-harmonic generation (resonant optical SHG) at the interfaces between aqueous sample solutions and liquid membranes, based on ionophores with different surface activities was measured in order to investigate the influence of the surface activity of ionophores on ion-selective charge separation. As ionophores with different surface activities, but bearing the same crown ether moiety as a binding site for the NaィイD1+ィエD1 ion, 4'-(p-octadecylbenzoateazo)phenoxymethyl-15-crown-5 (1) and 4'-(p-methylbenzoateazo)phenoxymethyl-15-crown-5 (2) were synthesized. The dependence of the SHG intensities on the polarization angle of the incident laser light showed that the average molecular orientations of ionophores 1 and 2 at the liquid/liquid interface were nearly equal to each other. When the concentration of NaィイD1+ィエD1 ion in the aqueous sample solutions increased, increases in the SHG intensities were observed for both membranes based on ionophores 1 and 2. However, the SHG intensities based on ionophore 1 were stronger, suggesting that the surface activity of ionophore 1 is higher than that of ionophore 2. The change in the phase boundary potentials of the ionophore 1-based membrane in contact with the aqueous NaィイD1+ィエD1 ion solutions was found to be larger than that of ionophore 2. An improvement in the potentiometric detection limit for NaィイD1+ィエD1 ion was also shown for membranes based on surface-active ionophore 1. These results demonstrate that the extent of charge separation at the liquid/liquid interface, as observed by resonant SHG from primary ion complexes, is increased by using surface-active ionophores.