Ion pair cooperative binding of potassium salts by new rhenium(I) bipyridine crown ether receptors

被引：59

作者：

Uppadine, LH

Redman, JE

Dent, SW

Drew, MGB

Beer, PD

机构：

[1] Univ Oxford, Inorgan Chem Lab, Dept Chem, Oxford OX1 3QR, England

[2] Univ Reading, Dept Chem, Reading RG6 6AD, Berks, England

来源：

INORGANIC CHEMISTRY | 2001年 / 40卷 / 12期

关键词：

D O I：

10.1021/ic001450v

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The new rhenium(I) bipyridine crown ether receptors 1-4 have been prepared and their ion pair recognition properties examined. The crystal structure of [1 . KCl](2). 2H(2)O demonstrates that potassium is coordinated by benzo-18-crown-6 and chloride is hydrogen bonded to the amide groups. Receptor 3 extracts solid KCl and KOAc into chloroform via ion pair complexation. NMR and emission titration studies with receptors 1-4 and KCl/KOAc show that cobound potassium enhances anion binding strength by electrostatic and conformational effects. Significant cooperative interactions are observed between the anion and cation sites for host 4 in CH3CN. This molecule coordinates potassium to form a 1:1 intramolecular sandwich complex, which preorganizes the host for acetate binding.

引用

页码：2860 / 2869

页数：10

共 59 条

[51] Synthesis and characterization of novel acyclic, macrocyclic, and calix[4]arene ruthenium(II) bipyridyl receptor molecules that recognize and sense anions [J].