物理化学学报 >> 1994, Vol. 10 >> Issue (05): 418-423.doi: 10.3866/PKU.WHXB19940509

研究论文 上一篇    下一篇

Cu(II)-2,2'-联喹啉在液/液界面转移及反应动力学

王曰/山明, 汪尔康   

  1. 中国科学院长春应用化学研究所电分析化学开放实验室，长春 130022
  • 收稿日期:1992-11-21 修回日期:1993-05-22 发布日期:1994-05-15
  • 通讯作者: 汪尔康

Cupric (II)-2,2'-Biquinoline Transfer Across the Liquid/Liquid Interface and Kinetics of Complexation

Wang Han-Ming, Wang Er-Kang   

  1. Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Acadmey of Sciences, Changchun 130022
  • Received:1992-11-21 Revised:1993-05-22 Published:1994-05-15
  • Contact: Wang Er-Kang

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摘要：

用循环伏安法研究了2,2’-联喹啉推动Cu~(2+)在水/硝基苯界面的转移，提出了配合转移机理，并研究了配合反应过程的动力学，测定了Cu~(2+)和2,2’-联喹啉形成的1:2配合物的界面热力学参数和配合物的形成速率常数k．

关键词: 水/硝基苯界面, 循环伏安法, 离子转移, 配合反应动力学, 2,2'-联喹啉, 铜离子(II)

Abstract:

Cupric (Ⅱ) ion transfer across the water/nitrobenzene interface facilitated by 2,2'-biqulnoline was investigated by cyclic voltammtry. Transfer process was controlled by diffusion. At [BQ]_(NB)>>[Cu~(2+)]_W, transfer ion was found to be 1:2 Cu~(2+)-biquinoline complex. Kinetics of complex action was described. Diffusion coefficient of Cu(BQ)~(2+)_2 in water phase was estimated as 3.8×10~(-5) cm~2/s and rate constant k of this complex action was determined as 2.6×10~(-4) s~(-1). At [Cu~(2+)]_W>>[BQ]_(NB), no transfer peaks were observed and 1:1 Cu~(2+)-biquinoline complex was formed.

Key words: Water/nitrobenzene interface, Cyclic voltammetry, Ion transfer, Kinetic of complexation, 2,2-biquinoline, Cupric (II)