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系统研究了三类有机锡化合物的阴离子响应行为.结果表明,有机锡化合物的结构与电极响应行为之间呈现出非常密切的构效关系.三类有机锡化合物对水杨酸根离子均呈现出选择性的电位响应性能,其中四配位有机锡化合物对水杨酸根离子呈现近Nernst响应,而五、六配位有机锡化合物对水杨酸根离子均呈现超Nernst响应.更重要的是,载体中心原子上正电荷密度对电极响应性能有很大影响.随着与锡原子相连的有机基团性质的变化,载体对水杨酸根离子的电位响应性能和选择性均发生规律性的变化,通过Hammett常数定性地描述了载体结构与电极性能的构效关系.同时,通过交流阻抗、膜红外光谱等技术对电极响应机制作了初步探讨,并对超Nernst现象和六配位有机锡化合物的响应行为进行了解释.
The anion-responsive behavior of three organotin compounds has been investigated systematically. The results show that there is a close relationship between the structure and the electrode response behavior of the organic tin compounds. All three organotin compounds show a selective response to salicylate ions The potential responses of the compounds were investigated, in which the tetra-coordinated organotin compounds exhibited nearly Nernst response to salicylate ions, while the five- and six-coordinated organotin compounds exhibited super-Nernst response to salicylate ions. More importantly, The positive charge density of the atom has a great influence on the electrode response performance.With the change of the nature of the organic group connected with the tin atom, the potential response and selectivity of the salicylate ion of the carrier change regularly, The structure-property relationship between the structure of the carrier and the performance of the electrode was qualitatively described by the constants. At the same time, the electrode response mechanism was discussed by AC impedance and membrane infrared spectroscopy. The response of the super-Nernst phenomenon and the response of the hexacoordinated organotin compound Explained.