Effect of the Mn Oxidation State on Single-Molecule-Magnet Properties: Mn(III) vs Mn(IV) in Biologically Inspired DyMn3O4 Cubanes.

Effect of the Mn Oxidation State on Single-Molecule-Magnet Properties: Mn(III) vs Mn(IV) in Biologically Inspired DyMn3O4 Cubanes.
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DOI:
10.1021/acs.inorgchem.6b00630
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发表时间:
2016-06-20
影响因子:
4.6
通讯作者:
Agapie T
Agapie T
中科院分区:
化学2区
文献类型:
--
作者:
Lin PH;Tsui EY;Habib F;Murugesu M;Agapie T

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受光系统II的析氧配合物的立方模型CaMnIV3O4中铁磁耦合的启发,制备了3d-4f混合金属DyMn3O4簇以研究其磁性能。为了进行比较,我们还研究了YMnIV3O4和YMnIV2MnIIIO4簇,它们表现出铁磁相互作用,就像钙类似物一样。DyMnIV3O4表现出单分子磁体性质,而单电子还原种(DyMnIV2MnIIIO4)则没有,尽管存在一个具有更高自旋和单离子各向异性的MnIII中心。
Inspired by the ferromagnetic coupling in the cubane model CaMnIV3O4 of the oxygen-evolving complex of photosystem II, 3d–4f mixed-metal DyMn3O4 clusters were prepared for investigation of the magnetic properties. For comparison, YMnIV3O4 and YMnIV2MnIIIO4 clusters were investigated as well and showed ferromagnetic interactions, like the calcium analogue. DyMnIV3O4 displays single-molecule-magnet properties, while the one-electron-reduced species (DyMnIV2MnIIIO4) does not, despite the presence of a MnIII center with higher spin and single-ion anisotropy.
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