波谱学杂志 ›› 1987, Vol. 4 ›› Issue (3): 221-227.

• 研究论文 • 上一篇    下一篇

几种易溶性有机溶剂水溶液的1H、13C、17O和31P NMR研究

薛毅, 杜有如   

  1. 中国科学院武汉物理研究所波谱及原子分子物理开放研究实验室
  • 收稿日期:1987-02-19 修回日期:1987-03-17 出版日期:1987-09-05 发布日期:2018-01-22

1H、13C、17O AND 31P NMR STUDIES OF BINARY MIXTURES OF WATER WITH SOME ORGANIC SOLVENTS

Xue Yi, Du Youru   

  1. Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Institute of Physics, Academia Sinica, Wuhan
  • Received:1987-02-19 Revised:1987-03-17 Online:1987-09-05 Published:2018-01-22

摘要: 本文用络合平衡及快交换的方法定量描述了磷酸三乙酯(TEP)、四氢呋喃(THF)、二氧六环(DO)和乙腈(AN)水溶液中化学位移随浓度变化的曲线。发现体系中未配位水的1H化学位移与其浓度的关系为:H2O δ0=1.07+3.71ek(0.018-1)/[H2O]。K值与溶剂的供电性和分子量有关。溶剂破坏水结构的能力取决于它的供电性。

关键词: 有机溶剂, 水溶液, NMR, 拟合, 水结构

Abstract: In simulating the chemical shift-concentration curves of organic solvents in the binary mixtures of water with tetrahydrofuran, dioxane, acetonitrile and triethyl phosphate, the formation constants of 1:1 and 1:2 complexes were evaluated. With the constants thus obtained, the 1H chemical shifts of water were calculated which fit well to those observed, when the 1H chemical shift of un-combined water is expressed by:H2Oδ0=1.07+3.71ek(0.018-1/[H2O]),where k is a constant characterizing the basicity and molecular weight of the solvent. The degree of structural break of water by organic solvents depends on their basicities.

Key words: Aprotic Solvent, Water solution, NMR, Simulation, Water structure