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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (18): 1739-1742. 上一篇    下一篇

研究论文

Fe(III)与2,3-二羟基苯磺酸钠配位反应的动力学研究

沈雪松1,2，秦雪莲1，刘义*,2,3，屈松生2   

  1. (1桂林医学院药学院 桂林 541004)
    (武汉大学 2化学与分子科学学院 3病毒学国家重点实验室 武汉 430072)
  • 投稿日期:2004-10-26 修回日期:2005-05-31 发布日期:2010-12-10
  • 通讯作者: 刘义

Kinetic Study on the Coordination of Fe(III) and 2,3-Dihydroxy-benzenesulfonate

SHEN Xue-Song1,2, QIN Xue-Lian1, LIU Yi*,2,3, QU Song-Sheng2   

  1. (1 Department of Pharmacy, Guilin Medical College, Guilin 541004)
    (2 College of Chemistry and Molecular Sciences, 3 State Key Laboratory of Virology, Wuhan University, Wuhan 430072)
  • Received:2004-10-26 Revised:2005-05-31 Published:2010-12-10
  • Contact: LIU Yi

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被引次数

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[H+]在0.01～0.70 mol•L－1范围内, 离子强度为1.00 mol•L－1, [Fe(III)]>>[配体]、[H+]>>[配体]的条件下, 研究了Fe(III)与2,3-二羟基苯磺酸钠(Tiron)的配位反应. 发现当[H+]≤3.00×10－2 mol•L－1时, [Fe(III)]2对反应速率有明显的贡献. 求得了相关反应的动力学参数, 从而揭示了FeOH2+和与Tiron配位的解离反应途径及的缔合反应机制, 并提出了该配位反应的可能机理.

关键词: Fe(III), 2,3-二羟基苯磺酸钠, 配位反应, 动力学

The kinetics of the coordination of Fe(III) and 2,3-dihydroxy-benzenesulfonate (Tiron) has been studied under the condition of ionic strength 1.00 mol•L－1, [H＋] from 0.01 to 0.70 mol•L－1 and [Fe(III)]>>[Tiron]. The reaction rate investigation showed that if [H＋]≤3.00×10－2 mol•L－1, [Fe(III)]2 has an unusual contribution to the reaction rate. Kinetic parameters for related reactions have been obtained. For an explanation of each rate constant and kinetic results, a dissociation reaction mechanism of complexation of [Fe(III)]2, and Tiron, and an association reaction mechanism of , have been disclosed. A possible mechanism for the coordination reaction has been proposed.

Key words: iron(III), 2,3-dihydroxy-benzenesulfonate, complex, kinetics