An [FeIII34] Molecular Metal Oxide
The dissolution of anhydrous iron bromide in a mixture of pyridine and acetonitrile, in the presence of an organic amine, results in the formation of an [Fe34] metal oxide molecule, structurally characterised by alternate layers of tetrahedral and octahedral FeIII ions connected by oxide and hydroxi...
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Published in | Angewandte Chemie Vol. 131; no. 47; pp. 17059 - 17062 |
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Main Authors | , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley Subscription Services, Inc
18.11.2019
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Subjects | |
Online Access | Get full text |
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Summary: | The dissolution of anhydrous iron bromide in a mixture of pyridine and acetonitrile, in the presence of an organic amine, results in the formation of an [Fe34] metal oxide molecule, structurally characterised by alternate layers of tetrahedral and octahedral FeIII ions connected by oxide and hydroxide ions. The outer shell of the complex is capped by a combination of pyridine molecules and bromide ions. Magnetic data, measured at temperatures as low as 0.4 K and fields up to 35 T, reveal competing antiferromagnetic exchange interactions; DFT calculations showing that the magnitudes of the coupling constants are highly dependent on both the Fe‐O‐Fe angles and Fe−O distances. The simplicity of the synthetic methodology, and the structural similarity between [Fe34], bulk iron oxides, previous FeIII–oxo cages, and polyoxometalates (POMs), hints that much larger molecular FeIII oxides can be made.
Fe Maiden: Ein molekulares [Fe34]‐Metalloxid besteht aus einem [Fe4]‐Tetraeder, das in einem gekappten [Fe18]‐Tetraeder verkapselt ist, auf dessen Flächen sich vier [Fe3]‐Dreiecke anordnen. Die Struktur enthält abwechselnde Schichten von tetraedrischen und oktaedrischen Fe‐Ionen, die über Oxid‐ und Hydroxidanionen verknüpft sind. |
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ISSN: | 0044-8249 1521-3757 |
DOI: | 10.1002/ange.201911003 |