高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (7): 738.

• 研究论文 • 上一篇    下一篇

35Cl的核磁共振法研究高氯酸钙的离子缔合和离子溶剂化

李芝芬, 钱泓, 黄忆宁, 刘瑞麟   

  1. 北京大学物理化学研究所
  • 收稿日期:1987-12-01 出版日期:1989-07-24 发布日期:1989-07-24
  • 通讯作者: 刘瑞麟
  • 基金资助:

    国家自然科学基金

A Study on Ion Pair and Ionic Solvation of Ca(ClO4)2 in Some Solvents and Their Mixtures by 35Cl NMR

Li Zhifen, Qian Hong, Huang Yining, Liu Ruilin   

  1. Institute of Physical Chemistry, Peking University, Beijing
  • Received:1987-12-01 Online:1989-07-24 Published:1989-07-24

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摘要： 本文研究了在10种溶剂中0.5mol/L的Ca(ClO4)2中35Cl的峰宽和6种溶剂中35Cl峰宽随盐浓度的变化,讨论了离子缔合与溶剂性质及离子性质的关系;以乙睛或乙醇泎溶剂,在Ca(ClO1)2浓度固定时,观察35Cl峰宽随第2溶剂组分B(此处B为H2O或DMF)的加入量(以[B]/[Ca2+]表示)的变化,讨论了变化规律、原因及钙离子被水或DMF的溶剂化数;还结合电导数据,讨论了Ca2+离子与ClO1,离子的相互作用和缔合型式。

关键词: 弛豫速率, 离子缔合, 离子溶剂化

Abstract: This research has recorded the linewidth of 35Cl of 0.5 mol/L Ca(ClO4)2 solution in ten solvents and the variation of linewidth with concentration of salt in six solvents.The relation between ionic association and the properties of solvent and ion was explored.The linewidth of 35Cl in acetoni-trile or ethanol as bulk solvent at fixed concentration of Ca(ClO4)2 was measured as a function of [B]/[Ca2+], where Brepresents H2Oor DMF.The trend of the plot and the reason for that were explained.The solvation numbers of Ca2+ by solvents were withdrawn from plots.The type of ion pairing of Ca2+ and ClO4- was assumed based on the conductance data.

Key words: Relaxation rate, Ionic association, Ionic solvation

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