磺化杯[4]芳烃与双正电荷季铵盐的键合作用  

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

作　　者：李振泉[1] 胡春秀[2] 程玉桥[1] 徐辉[1] 曹绪龙[1] 宋新旺[1] 张衡益[2] 刘育[2] 

机构地区：[1]中国石化胜利油田分公司地质科学研究院,东营257015 [2]南开大学化学系元素有机化学国家重点实验室,天津300071

出　　处：《高等学校化学学报》2013年第4期853-857,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20932004,20972077);中国石化前瞻性基础性研究课题(批准号:P07009)资助

摘　　要：采用核磁波谱和等温微量热滴定等手段研究了磺化杯[4]芳烃与3个双正电荷季铵盐相互作用的键合比、键合模式以及热力学参数.结果表明,磺化杯[4]芳烃与3个双正电荷季铵盐以不同的键合模式形成1:1络合物,其键合常数均超过105L/mol,键合作用主要由焓变驱动,同时伴随着微弱的正负熵变.The stoichiometric ratio, binding modes, complex stability constants and thermodynamic parame- ters of p-sulfonatocalix[ 4 ] arene with three quaternary ammonium dication salts were studied in aqueous buffer solution （ pH = 7.20） by means of 1H 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-sulfonato- calix[4 ] arene with three quaternary ammonium dication salts are more than 105 L/mol. Thermodynamically, the host-guest binding behavior are mainly driven by the favorable enthalpic changes, accompanied by the unfavorable entropic changes.

关 键 词：双正电荷季铵盐 芳烃 热力学 

分 类 号：O625[理学—有机化学]