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首页> 外文期刊>Electroanalysis >Lower Rim Substituted p-tert-Butyl-Calix[4]arene. Part 15. Pb(II)-Ion-Selective Electrodes Based on p-tert-Butyl-calix[4]arene Thioamides
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Lower Rim Substituted p-tert-Butyl-Calix[4]arene. Part 15. Pb(II)-Ion-Selective Electrodes Based on p-tert-Butyl-calix[4]arene Thioamides

机译:下缘取代了对叔丁基-Calix [4]芳烃。第15部分。基于对叔丁基杯杯[4]芳烃硫代酰胺的Pb(II)离子选择电极

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Tetrasubstituted p-tert-butylcalix[4]arene-thioamides (1-5) were applied as ionophores in ion-selective membrane electrodes (ISE) and were tested towards Pb-selectivity. The selectivity coefficients of the electrodes were determined. The tertiary calix[4]thioamides (1, 2) show remarkable selectivity for Pb(II) cations when compared with respectable calix[4]amides. The electrode membranes with those ligands are stable, the Pb-characteristics are close to nernstian within a wide linear range (-log c = 6-1). Compounds 3-5, the secondary calix[4]thioamides form less stable electrode membranes. Complex formation constants of the ligands 1, 2, 3 and 5 with Pb(II) and some most interfering ions were determined.
机译:将四取代的对叔丁基杯[4]亚芳基硫代酰胺(1-5)作为离子载体应用于离子选择性膜电极(ISE)中,并进行了对Pb选择性的测试。确定电极的选择性系数。与可比的杯[4]酰胺相比,叔杯[4]硫代酰胺(1、2)对Pb(II)阳离子显示出显着的选择性。具有这些配体的电极膜是稳定的,Pb特性在宽线性范围内(-log c = 6-1)接近神经。化合物3-5,第二杯[4]硫代酰胺形成较不稳定的电极膜。确定了配体1、2、3和5与Pb(II)和一些干扰最大的离子的配合物形成常数。

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