应用化学 ›› 1988, Vol. 0 ›› Issue (4): 84-86.

• 研究简报 • 上一篇    下一篇

醋酸水溶液中Pr(Ⅳ)的稳定性

吴大庆1, 冯殿忠2   

  1. 1. 浙江大学化学系 杭州;
    2. 兰州大学化学系
  • 收稿日期:1987-10-04 修回日期:1987-12-08 出版日期:1988-08-10 发布日期:1988-08-10

ON THE STABILITY OF Pr(Ⅳ) IN ACETIC ACID

Wu Daqing1, Feng Dianzhong2   

  1. 1. Department of Chemistry, Zhejiang University;
    2. Department of Chemistry, Lanzhou University
  • Received:1987-10-04 Revised:1987-12-08 Published:1988-08-10 Online:1988-08-10

摘要: 由于E°pr(IV)pr(Ⅲ)=+3.2V[1],Pr(Ⅳ)不易在一般水溶液中稳定存在.用无机络合剂稳定水溶液中Pr(Ⅳ)的工作,已有一些报导[2,3,4].1980年,顾翼东[5]报导过四价铈镨混合氧化物在冰醋酸中稳定情况.我们将自制的碱式碳酸镨(Ⅳ,Ⅲ)溶于醋酸水溶液中,研究了Pr(Ⅳ)在该溶液中的行为和其还原动力学性质.

关键词: 镨离子, 醋酸, 配合物

Abstract: Basic carbonate of Pr(Ⅳ) being dissolved in aqueous solution of acetic acid gives an yellow Pr(Ⅳ)-Ac- complex which shows a broad characteristic absorption band at 266nm.The ratio of Pr(Ⅳ): Ac- in complex as determined by equilibrium shifting method is 1:4.It is found that the reduction of Pr (Ⅳ)-Ac- complex in aqueous acetic acid solution is a pseudo first order reaction.

Key words: Praseodymium ion, Acetic acid, Complex