高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (11): 1186.

• 研究论文 • 上一篇    下一篇

桥联异多核配合物稳定性的ESR研究

陈东1, 唐雯霞1, 戴安邦1, 韩世莹2, 王化勤2   

  1. 1. 南京大学配位化学研究所, 210008;
    2. 南京大学现代分析中心
  • 收稿日期:1989-03-06 出版日期:1990-11-24 发布日期:1990-11-24
  • 通讯作者: 唐雯霞

ESR Studies on the Stability of Imidazolate and r,r'-Bipyridinate Bridged Heteropolynuclear Complexes

Chen Dong1, Tang Wenxia1, Dai Anbang1, Hang Shiying2, Wang Huaqin2   

  1. 1. Coordination Chemistry Institute, Nanjing University, Nanjing, 210008;
    2. Center of Material Analysis, Nanjing University, Nanjing
  • Received:1989-03-06 Online:1990-11-24 Published:1990-11-24

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被引次数

1

摘要： 用电子自旋共振方法研究了咪唑和r,r'-联吡啶桥联配合物的稳定性。结果表明,咪唑桥联异双核和异三核配合物中的咪唑桥均在pH=7.8～8.5范围内断裂,形成单核配合物[(NH3)5CoIm]2+和[(dien)CuH2O]2+,而r,r'-联吡啶桥联的异双核配合物的联吡啶桥则在pH<6.0时才开始断裂,形成单核配合物。当pH=3.7～2.5时,[(dien)CuH2O]2+经水合反应,形成[Cu(H2O)6]2+。

关键词: 咪唑桥联配合物, 稳定性, ESR

Abstract: The determination of the pHdependent ESRspectra of some imidazolate and r,r'-bipyridi-nate bridged heteropolynuclear complexes:Co-Im-Cu, Co-Im-Cu-Im-Co and Co-(r,r'-bpy)-Cu have been carried out and show that the imidazolate bridged dinuclear and trinuclear cations exist as major species in .the solution only between pH: 7. 8-8. 5,but r,r'-bipyridinate bridged cation exists in solution in a wider pHrange (pH>6). At low pHthe imidazolate and r,r'-bipyridinate bridge are broken and eventually free Cu2+ion forms.

Key words: Lmidazolate bridged complex, Stability, ESR

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