高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (10): 1669.

• 论文 • 上一篇    下一篇

镉卟啉生成反应动力学及动力学盐效应研究

阮文娟, 朱志昂, 陈红卫, 林华宽, 邵迎, 杨秀檩, 陈荣悌   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1996-09-10 出版日期:1997-10-24 发布日期:1997-10-24
  • 通讯作者: 朱志昂.
  • 作者简介:阮文娟, 女, 39岁, 博士, 讲师.
  • 基金资助:

    国家自然科学基金;天津市自然科学基金

Kinetic Studies on the Formation Reaction of Cadmium(Ⅱ)with Porphyrin and the Salt Effect

RUAN Wen-Juan, ZHU Zhi-Aug, CHEN Hong-Wei, LIN Hua-Kuan, SHAO Ying, YANG Xiu-Lin, CHEN Rong-Ti   

  1. Department of Chemistry, Nankai University, Tianjin 300071
  • Received:1996-09-10 Online:1997-10-24 Published:1997-10-24

摘要: 对四-间甲基-苯基卟啉H2T(m-CH3)PP与Cd(Ⅱ)离子在丙酮中的生成反应进行了研究.提出了合理的反应机理,探讨了温度对反应速率的影响规律,并发现较高离子强度对反应速率的影响呈负盐效应.根据Debye-Huckel理论和实验结果,得到了反应的速率常数与离子强度间的定量关系式.

关键词: 镉卟啉, 生成反应动力学, 反应机理, 离子强度, 动力学盐效应

Abstract: The kinetics of formation reaction of Cd(Ⅱ) with meso-tetra-meta-toluene-porphyrin [H2T(m-CH3)PP] in acetone has been studied by means of stopped-flow method. Theproper reaction mechanism was proposed. The effects of temperature on the reaction ratewere investigated. It was found that kobs was reduced with the increase of the ionic strength,that is, the negative kinetic salt effect was observed. According to Debye-Huckel theory andthe experimental results a good linear relationship between rate constant and ionic strengthwas obtained.

Key words: Cadmium (Ⅱ) porphyrin, Kinetics of formation reaction, Mechanism of reaction, Ionic strength, Kinetic salt effects

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