Binding Thermodynamics of p-Sulfonatocalix[4]arene with Quaternary Ammonium Dications

被引：2

作者：

Li Zhen-Quan ^{[1
]}

Hu Chun-Xiu ^{[2
]}

Cheng Yu-Qiao ^{[1
]}

Xu Hui ^{[1
]}

Cao Xu-Long ^{[1
]}

Song Xin-Wang ^{[1
]}

Zhang Heng-Yi ^{[2
]}

Liu Yu ^{[2
]}

机构：

[1] Shengli Oilfield Co, Geol Sci Res Inst, SINOPEC, Dongying 257015, Peoples R China

[2] Nankai Univ, Dept Chem, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2013年 / 34卷 / 04期

关键词：

Quaternary ammonium dication; p-Sulfonatocalix[4]arene; Thermodynamics; GEMINI SURFACTANTS; CATIONS; WATER; ACETYLCHOLINE; COMPLEXATION; SULFONATOCALIXARENES; RECOGNITION; CHOLINE; METAL; IONS;

D O I：

10.7503/cjcu20120897

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The stoichiometric ratio, binding modes, complex stability constants and thermodynamic parameters of p-sulfonatocalix[4]arene with three quaternary ammonium dication salts were studied in aqueous buffer solution (pH=7.20) by means of H-1 NMR spectroscopy and microcalorimetrical titration. The results obtained from NMR experiments suggest the 1 : 1 stoichiometric ratio with different binding modes between host and guest. The results of the microcalorimetrical titration show that the complex stability constants of p-sulfonatocalix[4]arene with three quaternary ammonium dication salts are more than 10(5) L/mol. Thermodynamically, the host-guest binding behavior are mainly driven by the favorable enthalpic changes, accompanied by the unfavorable entropic changes.

引用

页码：853 / 857

页数：5