...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electroanalysis >Silver ion-selective electrodes based on pi-coordinating ionophores without heteroatoms
【24h】

Silver ion-selective electrodes based on pi-coordinating ionophores without heteroatoms

机译：基于pi配位离子载体且无杂原子的银离子选择电极

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ion-selective electrodes (ISEs) were constructed by using spherical hydrocarbons (cyclophanes) as pi-coordinating ionophores in solvent polymeric membranes. Four structurally similar cyclophanes, i.e., [2.2.2]p,p,p-cyclophane, [2.2.2]m,p,p-cyclophane, [2.2.1]p,p,p-cyclophane and [2.2.1]m,p,p-cyclophane were studied as ionophores for Ag+. The ion-selective membranes were composed of the corresponding ionophore (1%), potassium tetrakis(4-chlorophenyl)borate (0.5%), 2-nitrophenyl octyl ether (65 - 66%) and PVC (32 - 33%). The ion-selective membrane was placed on top of a layer of the conducting polymer, poly(3,4-ethylenedioxythiophene) (PEDOT), working as ion-to-electron transducer. The selectivity pattern of the solid-contact ISEs was found to depend strongly on the structure of the cyclophane. The results show that ionophores that do not contain any heteroatoms such as sulfur, nitrogen or oxygen can be highly selective to "soft" cations like Ag+, based solely on cation-pi interactions between Ag+ and benzene rings. The lipohilic tetrakis(4-chlorophenyl)borate, which also contains pi-coordinating phenyl groups, and which is used as the anionic additive in the ion-selective membrane, shows a remarkable selectivity for Hg2+. The selectivity is discussed in terms of cation-pi interactions between Ag+ and the ionophores. [References: 15]
机译：离子选择电极（ISE）是通过使用球形碳氢化合物（环烷）作为溶剂聚合物膜中的pi配位离子载体而构建的。四个结构相似的环烷，即[2.2.2] p，p，p-环烷，[2.2.2] m，p，p-环烷，[2.2.1] p，p，p-环烷和[2.2.1]研究了] m，p，p-环环烷作为Ag +的离子载体。离子选择膜由相应的离子载体（1％），四（4-氯苯基）硼酸钾（0.5％），2-硝基苯基辛基醚（65-66％）和PVC（32-33％）组成。将离子选择膜放在导电聚合物，即聚（3,4-乙撑二氧噻吩）（PEDOT）层的顶部，用作离子-电子换能器。发现固体接触ISE的选择性模式在很大程度上取决于环烷的结构。结果表明，不包含任何杂原子（例如硫，氮或氧）的离子载体，仅基于Ag +与苯环之间的阳离子-π相互作用，可以对诸如Ag +的“软”阳离子具有高度选择性。脂族四（4-氯苯基）硼酸酯也含有pi配位苯基，并用作离子选择膜中的阴离子添加剂，对Hg2 +具有显着的选择性。根据Ag +和离子载体之间的阳离子-π相互作用来讨论选择性。 [参考：15]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号