Effect of the Mn Oxidation State on Single-Molecule-Magnet Properties: MnIII vs MnIV in Biologically Inspired DyMn3O4 Cubanes

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• 作者：Po-Heng Lin ; Emily Y. Tsui ; Fatemah Habib ; Muralee Murugesu ; Theodor Agapie
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：June 20, 2016
• 年：2016
• 卷：55
• 期：12
• 页码：6095-6099
• 全文大小：446K
• 年卷期：0
• ISSN：1520-510X

文摘

Inspired by the ferromagnetic coupling in the cubane model CaMn^IV₃O₄ of the oxygen-evolving complex of photosystem II, 3d–4f mixed-metal DyMn₃O₄ clusters were prepared for investigation of the magnetic properties. For comparison, YMn^IV₃O₄ and YMn^IV₂Mn^IIIO₄ clusters were investigated as well and showed ferromagnetic interactions, like the calcium analogue. DyMn^IV₃O₄ displays single-molecule-magnet properties, while the one-electron-reduced species (DyMn^IV₂Mn^IIIO₄) does not, despite the presence of a Mn^III center with higher spin and single-ion anisotropy.