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An [FeIII34] molecular metal oxide

AuthorsDearle, Alice E.; Cutler, Daniel J.; Fraser, Hector W. L.; Sanz, Sergio; Lee, Edward; Dey, Sourav; Diaz-Ortega, Ismael F.; Nichol, Gary S.; Nojiri, Hiroyuki; Evangelisti, Marco CSIC ORCID ; Rajaraman, Gopalan; Schnack, Jürgen; Cronin, Leroy; Brechin, Euan K.
Issue Date2019
CitationAngewandte Chemie International Edition 58(47): 16903-16906 (2019)
AbstractThe 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.
Publisher version (URL)https://doi.org/10.1002/anie.201911003
Appears in Collections:(ICMA) Artículos
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