Dawit Tesfaye, Jonas Braun, Mamo Gebrezgiabher, J. Kuchár, J. Černák, Taju Sani, A. Gismelseed, Tim Hochdörffer, Volker Schünemann, C. Anson, Annie K. Powell, Madhu Thomas
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引用次数: 0
摘要
我们合成了一种新的铁（III）配合物 (Et3NH)2[Fe(L)2](ClO4)-MeOH (1)，其中 H2L = 2-{(E)-[2-羟基苯基)亚氨基]甲基}苯酚，并通过单晶 XRD、元素分析和直流磁感应强度测量对其进行了表征。二阴离子配体 L2- 通过其去质子化的酚氧原子和偶氮甲基氮原子与铁（III）以三叉配位方式配位，形成反式-FeO4N2 发色团。在 0.1 T 的外加磁场下，在 300 至 5 K 之间进行了变温磁性测量，结果表明 1 在整个测量温度范围内都处于高自旋状态（S = 5/2）。在 77 和 300 K 温度下进行的莫斯鲍尔光谱分析也证实了这一点。
Mononuclear Fe(III) Schiff Base Complex with Trans-FeO4N2 Chromophore of o-Aminophenol Origin: Synthesis, Characterisation, Crystal Structure, and Spin State Investigation
A new iron(III) complex (Et3NH)2[Fe(L)2](ClO4)·MeOH (1) where H2L = 2-{(E)-[2-hydroxyphenyl)imino]methyl}phenol has been synthesised and characterised by single crystal XRD, elemental analysis and DC magnetic susceptibility measurements. The dianionic ligands L2− coordinate in a tridentate fashion with the Fe(III) through their deprotonated phenolic oxygens and azomethine nitrogen atoms, resulting in a trans-FeO4N2 chromophore. Variable-temperature magnetic measurements were performed between 300 and 5 K under an applied field of 0.1 T and show that 1 is in the high spin state (S = 5/2) over the whole measured temperature range. This is confirmed by Mössbauer spectroscopy at 77 and 300 K.
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