| NMR研究溶剂与碱金属离子竞争配位过程 |
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| 引用本文： | 杨振云,刘秀梅,杨文德.NMR研究溶剂与碱金属离子竞争配位过程[J].分析测试学报,1992(3). |
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| 作者姓名： | 杨振云 刘秀梅 杨文德 |
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| 作者单位： | 中国科学院大连化学物理研究所
(杨振云，刘秀梅)，中国科学院大连化学物理研究所(杨文德) |
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| 摘 要： | 本文研究了锂、铵、钠、铯等盐类在21种溶剂中的~7Li、~(14)N、~(23)Na、~(133)Cs/NMR谱。考察了溶剂对碱金属离子化学位移的影响,求出了浓度系数。并研究了上述离子在15种二元溶剂体系中竞争配位过程,基于NMR数据,测定了等溶剂化点,交换过程平衡常数K及自由能变化△G等热力学参数。
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| 关 键 词： | ~7Li-NMR ~(14)N-NMR ~(23)Na-NMR ~(133)Cs-NMR 溶剂效应 竞争配位 平衡常数 |
NMR Studies On Solvent Competitive Coordinaion Towards Alkali Metallic Ions |
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| Yang Zhenyun,Liu Xiumei,Yang Wende Dalian Institute of Chemical Physics,Academia Sinica.NMR Studies On Solvent Competitive Coordinaion Towards Alkali Metallic Ions[J].Journal of Instrumental Analysis,1992(3). |
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| Authors: | Yang Zhenyun Liu Xiumei Yang Wende Dalian Institute of Chemical Physics Academia Sinica |
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| Abstract: | The ~7Li, ~(14)N, ~(28)Na, ~(133)Cs-NMR spectra were recorded for several lithium, ammonium, sodi-um, cesium salts in twenty one oxygen-and nitrogen-containing solvents. The influences of sol-vents on chemical shifts of alkali metal ions were investigated and concentration coefficientswere calculated. Competitive coordination processes towards alkali metal ions were studiedfor 15 binary systems including monodentate-monodentate, bidentate-monodentate, bidentate-bi-dentate coordination solvents. Based on the NMR data of solvent exchange processes, the isosol-vation points, chemical equilibrium constant K, and free energy variation ?G were deduced. |
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| Keywords: | ~7Li-NMR ~(14)N-NMR ~(23)Na-NMR ~(133)Cs-NMR Solvent effect Competitive coordination Equilibrium constant |
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