中华医学超声杂志

应用化学 ›› 1998, Vol. 0 ›› Issue (2): 91-93.

• 研究论文 • 上一篇    下一篇

氮、氧为配位原子的铅(Ⅱ)混合配合物的稳定性研究Ⅳ.铅(Ⅱ)-芳香氮碱-苯烷基丙二酸体系

高恩君1, 孙玉珍1, 刘祁涛2   

  1. 1. 沈阳化工学院配位化学研究室, 分析测试中心 沈阳110021;
    2. 辽宁大学化学系 沈阳
  • 收稿日期:1997-06-16 修回日期:1997-11-06 出版日期:1998-04-10 发布日期:1998-04-10
  • 基金资助:
    辽宁省自然科学基金

Studies of the Stabilities of Lead(Ⅱ) Mixed Ligand Complexes Containing Oxygen and Nitrogen as Coordination Atom Ⅳ.Lead(Ⅱ) Nitrogen Heterocycles Malonate System

Gao Enjun1, Sun Yuzhen1, Liu Qitao2   

  1. 1. Research Section of Coordination Chemistry, Center of Analysis and Test, Shenyang Institute of Chemical Engineering, Shenyang 110021;
    2. Department of Chemistry, Liaoning University, Shenyang
  • Received:1997-06-16 Revised:1997-11-06 Published:1998-04-10 Online:1998-04-10

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摘要： 混合配体配合物中配体间的相互作用在金属酶化学及其生物识别过程中具有重要意[1,2].以往的研究,主要针对具有部分填充的3d过渡金属离子与芳香氮碱、氨基酸或一元羧 配合物体系[3,4].铅(Ⅱ)为非过渡的主族金属离子,我们在对其PbLA型配合物的研究时 ,配合物中也存在配体间的相互识别作用[5～7].

关键词: 联吡啶, 邻菲咯啉, 硝基邻菲咯啉, 苯烷基丙二酸, 铅(Ⅱ)混合配合物, 稳定性

Abstract: The stability constants (logKPbLAPb) of the mixed ligand complexes, PbLA[L=2,2'-bipyridyl(bipy)、1,10-phenanthroline(phen)、5-nitro-1,10-phenanthroline(Nphe), A=malonic acid(mal2-)、 benzyl malonic acid(pmal2-)、 phenylethylmalonic acid radicals(pmal2-)] have been determined at 25 ℃ in 10% ethanol with ionic strength I =0.1(KNO3) mol/L by potentrometric titration. It is found that the ΔlogK、logX values of the mixed ligand complexes are obviously higher than the ΔlogK(s)、logX(s). The stability caused by the complexes has been discussed.

Key words: bipyridyl, phenanthroline, nitrophenanthroline, phenylalkyl malonate, lead(Ⅱ) mixed complex, stability

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