| 电喷雾离子化质谱测定冠醚与碱金属离子的结合常数 |
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| 引用本文： | 张海震,颜肖慈. 电喷雾离子化质谱测定冠醚与碱金属离子的结合常数[J]. 武汉大学学报(理学版), 2005, 51(2): 154-156 |
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| 作者姓名： | 张海震 颜肖慈 |
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| 作者单位： | 武汉大学,化学与分子科学学院,湖北,武汉,430072 |
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| 基金项目： | 湖北省经贸委和财政厅资助项目(200033) |
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| 摘 要： | 应用电喷雾离子化质谱测定络合物结合常数的新方法，将已知结合常数的18-冠-6与K^-的1：1络合物溶液([18-冠[6…K]^-)作为参考络合物加入到待测络合主体二苯并-18-冠-6或络合客体Na^-中，与参考络合物一起竞争络合．通过质谱信号强度的变化，推导出了待测络合物[18-冠-6…Na]^ 、[二苯并-18-冠-6…K]^ 和[二苯并-18-冠-6…Na]^ 的结合常数的对数值lgK^-分别为4．5，4．9和4．4．
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| 关 键 词： | 络合常数 电喷雾离子化质谱 络合竞争 |
| 文章编号： | 1671-8836(2005)02-0154-03 |
| 修稿时间： | 2004-11-13 |
Determination of Binding Constants of Crown Ether-Alkali Metal Cation Complexes by Electrospray Ionization Mass Spectrometry |
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| ZHANG Hai-zhen,Yan Xiao-ci. Determination of Binding Constants of Crown Ether-Alkali Metal Cation Complexes by Electrospray Ionization Mass Spectrometry[J]. JOurnal of Wuhan University:Natural Science Edition, 2005, 51(2): 154-156 |
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| Authors: | ZHANG Hai-zhen Yan Xiao-ci |
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| Abstract: | A new method for the determination of binding constants using electrospray ionization mass spectrometry was presented. A complex (~( )) with a known binding constant value was used as a reference. Then a second host dibenzao-18-crown-6 or guest Na~( )was added to compete with reference host or guest. On the basis of the change in intensity of the reference complex, the logarithm values of binding constants of ~( ) ,~( )and ~( ) are derived as 4.5,4.9 and 4.4 using a set of simultaneous equilibrium equations. |
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| Keywords: | binding constant electrospray mass spectrometry competitive complex |
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