一种对铵根离子相对于钾离子进行选择性识别的合理方法。
A Rational Approach to Selective Recognition of NH(4)(+) over K(+).
作者信息
Chin J, Walsdorff C, Stranix B, Oh J, Chung HJ, Park SM, Kim K
机构信息
Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 2K6 (Canada).
出版信息
Angew Chem Int Ed Engl. 1999 Sep;38(18):2756-2759.
PMID:10508372
Abstract
An ion-selective electrode (ISE) based on receptor 1 is highly selective for binding NH(4)(+) over K(+) (lg K(NH(4)(+)/K(+))=-2.6); the three imine nitrogen atoms in 1 are ideally positioned for hydrogen bonding with the tetrahedral NH(4)(+) ion. This selectivity is considerably greater than that found for commercial ISEs based on nonactin (lg K(NH(4)(+)/K(+))=-1.0).
摘要
基于受体1的离子选择性电极（ISE）对NH(4)(+)的结合选择性远高于K(+)（lg K(NH(4)(+)/K(+)) = -2.6）；1中的三个亚胺氮原子位置理想，可与四面体NH(4)(+)离子形成氢键。这种选择性远高于基于缬氨霉素的商用ISE（lg K(NH(4)(+)/K(+)) = -1.0）。
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