波谱学杂志 ›› 1993, Vol. 10 ›› Issue (3): 303-308.

• 研究论文 • 上一篇    下一篇

含Cr (Ⅲ)溶液中配位水质子的1H NMR研究

单志华, 刘其则, 朱正和, 何有节   

  1. 成都科技大学, 成都 610065
  • 收稿日期:1992-03-02 修回日期:1992-11-03 出版日期:1993-09-05 发布日期:2018-01-20

THE STUDY OF 1H NMR ON THE PROTONS IN SOLUTION CONTAINING Cr(Ⅲ)

Shan Zhihua, Liu Qizhe, Zu Zhenhe, He Youjie   

  1. Chengdu University of Sci. & Tech., Chengdu 610065
  • Received:1992-03-02 Revised:1992-11-03 Online:1993-09-05 Published:2018-01-20

摘要: 本文用1H NMR对水合Cr(Ⅲ)络离子中配位水和质子交换速率进行研究。在溶液pH为0~3.17范围测得质子的平均寿命约为10-5S。在pH为0~0.76范围质子交换反应动力学为一、二级混合过程。pH为0.76~1.6范围表现为一级过程。在Cr(Ⅲ)-H2O-Gly系统中,实验得出配位水质子的活动性减小。

关键词: 水合络离子, 交换速率, 平均寿命, 反应动力学, 核磁共振

Abstract: A study of the exchange process between the protons in a hydrated Cr(Ⅲ) ion and bulk was made with 1H NMR. In the region of pH=0-3.17, the average lifetime of the protons in hydration sphere is of 10s order. There is a dynamic exchange process of protons with a mixture of first and second-order in pH=0-0.76 and only first order in pH=0.76-1.6. In system of Cr(Ⅲ)-H2O-Gly, it was found that the protons in hydration sphere have activity weaken.

Key words: Hydrated Cr (Ⅲ) ion, Exchange rate, Average lifetime, Reaction dynamics, NMR