Counterion Binding in Solutions of p-Sulfonatocalix[4]arene

被引：36

作者：

Basilio, Nuno ^{[1
]}

Garcia-Rio, Luis ^{[1
]}

Martin-Pastor, Manuel ^{[2
]}

机构：

[1] Univ Santiago, Fac Quim, Dept Quim Fis, Santiago 15782, Spain

[2] Univ Santiago, RIAIDT, Unidad Resonancia Magnet, Santiago 15782, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2010年 / 114卷 / 21期

关键词：

STUDYING TRANSLATIONAL DIFFUSION; NUCLEAR-MAGNETIC-RESONANCE; CATION-PI INTERACTIONS; ORGANIC CATIONS; WATER; TOOL; NMR; CALIXARENES;

D O I：

10.1021/jp101474a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Na-23 relaxation NMR measurements and self-diffusion coefficients for sodium cations and p-sulfonatocalix[n]arenes (SCn) were obtained to confirm that monovalent inorganic cations are complexed by SC4. In the absence of added salts and at neutral pH. the cavity of p-sulfonatocalix[4]arene (SC4) fully binds an Na+ counterion. Our results provide evidence that when investigating the complexation of inorganic cations by SC4 a competitive binding scheme must be considered if more than one cation is present in solution. Moreover, it has been shown for the first time that SC6 and SC8 can also complex monovalent inorganic (sodium) cations.

引用

页码：7201 / 7206

页数：6

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