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Dimerized p-Semiquinone Radical Anions Stabilized by a Pair of Rare-Earth Metal Ions.
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-05-11 , DOI: 10.1021/acs.inorgchem.0c00503
Tian Han 1 , Jonatan B Petersen 2 , Zi-Han Li 1 , Yuan-Qi Zhai 1 , Andreas Kostopoulos 2 , Fabrizio Ortu 2 , Eric J L McInnes 2 , Richard E P Winpenny 2 , Yan-Zhen Zheng 1
Affiliation  

Here we report stable p-quinone-radical-bridged rare-earth complexes involving the ligand tetramethylquinone (QMe4•–). The complexes, {Y[(QMe4)•–Cl2(THF)3]}2 (1) and {Gd[(QMe4)•–Cl2(THF)3]}2 (2), where THF = tetrahydrofuran, are sufficiently stable that we can measure the single-crystal structures and perform magnetic and electron paramagnetic resonance measurements. These studies show the presence of a semiquinone form and that the magnetic interaction between the radicals in the dimer is strong and antiferromagnetic.

中文翻译:

通过一对稀土金属离子稳定的二聚对半醌自由基阴离子。

在这里,我们报道了涉及配体四甲基醌(QMe 4 •–)的稳定的对苯醌-自由基桥联稀土配合物。{Y [(QMe 4•– Cl 2(THF)3 ]} 21)和{Gd [(QMe 4•– Cl 2(THF)3 ]} 22)(其中THF =四氢呋喃)足够稳定,因此我们可以测量单晶结构并进行磁和电子顺磁共振测量。这些研究表明存在半醌形式,并且二聚体中自由基之间的磁性相互作用强且反铁磁性。
更新日期:2020-05-11
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