| Selective Transport of Alkali—Metal Cations through Liquid Membranes by Non—Cyclic Carriers |
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| 引用本文： | XU，Ming SONG，Kai 等.Selective Transport of Alkali—Metal Cations through Liquid Membranes by Non—Cyclic Carriers[J].中国化学,2002,20(1):90-95. |
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| 作者姓名： | XU，Ming SONG，Kai |
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| 作者单位： | TechnicalInstituteofPhysicsandChemistry,ChineseAcademyofSciences,Beijing100101,China |
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| 基金项目： | theMinistryofScienceandTechnologyofChina (Nos.G2 0 0 0 0 7810 4andG2 0 0 0 0 775 0 2)andtheNationalNatu
ralScienceFoundationofChina (Nos.2 96 0 2 0 0 9,2 0 0 72 0 38and 2 9832 0 40 ) |
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| 摘 要： | The emission spectra of a series of naphthalene end-labeled oligo-oxyethylene(N-Pn-N) and their facilitated transport of cations across liquid membranes have been investigated.Alkali-metal cations enhance or inhibit the intramolecular excimer formation of N-Pn-N remarkably,suggesting that the polyether chain of N-Pn-N in solution complexes with the cations,and the orientation of the terminal chromophores depends on the cation size and the length of the polyether chain. These compounds are able to act as carriers to facilitate transport of alkali-metal cations through organic liquid membranes.The transport efficiencies are comparable with those of cyclic carriers such as crown ethers,and show remarkable selectivity.
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| 关 键 词： | 碱金属阳离子 选择性迁移 萘 液膜 不循环载体 |
Selective Transport of Alkali-Metal Cations through Liquid Membranes by Non-Cyclic Carriers |
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| Ming Xu,Kai Song,Li‐Zhu Wu,Li‐Ping Zhang,Chen‐Ho Tung.Selective Transport of Alkali-Metal Cations through Liquid Membranes by Non-Cyclic Carriers[J].Chinese Journal of Chemistry,2002,20(1):90-95. |
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| Authors: | Ming Xu Kai Song Li‐Zhu Wu Li‐Ping Zhang Chen‐Ho Tung |
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| Abstract: | The emission spectra of a series of naphthalene end-labeled oligo-oxyethylene (N-P n-N) and their facilitated transport of cations across liquid membranes have been investigated. Alkali-metal cations enhance or inhibit the intramolecular excimer formation of N-P n-N remarkably, suggesting that the polyether chain of N-P n-N in solution complexes with the cations, and the orientation of the terminal chromophores depends on the cation size and the length of the polyether chain. These compounds are able to act as carriers to facilitate transport of alkali-metal cations through organic liquid membranes. The transport efficiencies are comparable with those of cyclic carriers such as crown ethers, and show remarkable selectivity. |
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| Keywords: | N-P n-N excimer ion extraction cation transport |
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