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首页> 外文会议>International Conference on X-ray Absorption Fine Structure >XAFS Study of the Ferro- and Antiferromagnetic Binuclear Copper(II) Complexes of Azomethine Based Tridentate Ligands
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XAFS Study of the Ferro- and Antiferromagnetic Binuclear Copper(II) Complexes of Azomethine Based Tridentate Ligands

机译：XAFS研究氮杂甲胺基三季配体的铁铁和反铁磁性铜铜（II）复合物

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Binuclear copper complexes are known to be models for metalloenzymes containing copper active sites, and some of them are of considerable interest due to their magnetic and charge transfer properties. The reactions of the complex formation of bibasic tridentate heterocyclic imines with copper acetate leads to two types of chelates with mono deprotonated ligands and with totally deprotonated ligands. Cu K-edge EXAFS has been applied to determine the local structure around the metal center in copper(II) azomethine complexes with five tridentate ligands: 1-(salycilideneimino)- or 1-(2-tosylaminobenzilideneimino)-2-amino(oxo, thio)benzimidazoles. It has been found that some of the chelates studied are bridged binuclear copper complexes, and others are mononuclear complexes. The copper-copper interatomic distances in the bridged binuclear copper complexes were found to be 2.85–3.01 ?. Variable temperature magnetic susceptibility data indicate the presence of both ferromagnetic and antiferromagnetic interactions within the dimer, the former is dominating at low temperatures and the latter at high temperatures.
机译：已知生物核铜配合物是含有铜活性位点的金属酶的模型，并且由于其磁性和电荷转移性能，其中一些具有相当大的兴趣。与醋酸铜的共染型杂环型亚胺的复合物形成的反应导致两种类型的螯合物与单溶栓配体和完全反驳的配体。已经应用Cu K-Edge EXAFS以确定铜（II）铜（II）铜（II）的金属中心周围的局部结构，其中五个三戊酮配体：1-（SalycilideneImino） - 或1-（2-甲硅烷基氨基苯甲酰氨基）-2-氨基（Oxo， Thio）Benzimidazoles。已经发现研究的一些螯合物是桥接的胆核铜配合物，其他螯合物是单核复合物。发现桥接胆铜配合物中的铜 - 铜间隙距离为2.85-3.01？。可变温度磁化率数据表明在二聚体内的铁磁性和反铁磁相互作用的存在，前者在低温下在高温下占据主导地位。

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