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From a Dense Structure to Open Frameworks: The Structural Plethora of Alkali Metal Iron Fluorophosphates

Siebeneichler, Stefanie ; Dorn, Katharina V. ; Smetana, Volodymyr ; Ovchinnikov, Alexander ; Mudring, Anja-Verena

Inorganic chemistry, 2022-06, Vol.61 (25), p.9767-9775 [Periódico revisado por pares]

United States: American Chemical Society

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  • Título:
    From a Dense Structure to Open Frameworks: The Structural Plethora of Alkali Metal Iron Fluorophosphates
  • Autor: Siebeneichler, Stefanie ; Dorn, Katharina V. ; Smetana, Volodymyr ; Ovchinnikov, Alexander ; Mudring, Anja-Verena
  • É parte de: Inorganic chemistry, 2022-06, Vol.61 (25), p.9767-9775
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: By employing the pyridinium hexafluorophosphate task-specific ionic liquids 1-butyl-4-methylpyridinium hexafluorophosphate ([C4mpyr]­[PF6]) and 1-ethylpyridinium hexafluorophosphate ([C2pyr]­[PF6]) as the reaction medium, mineralizer, structure-directing agent, and, in the case of the smaller pyridinium cation, even a structural component, it was possible to obtain five new alkali metal iron phosphates featuring interconnected FeX6 octahedra and PX4 (X = F, O, or OH) tetrahedra. NaFe­(PO3F)2 (1) is a dense 3D structure, RbFe­(PO3F)­(PO2(OH)­F)­(PO2(OH)2) (2) features 1D strands, (C2pyr)­LiFe­(PO3F)3(PO2F2)F (3) has 2D layers, and LiFe­(PO3F)­(PO2F2)F (4) as well as Cs0.75Fe­(PO2.75(OH)0.25F)­(PO2F2)2 (5) are 3D open frameworks. While in 1–2 as well as in 4 and 5, FeX6 octahedra and PX4 (X = F, O, or OH) tetrahedra alternate, 3 features octahedra dimers, Fe2X11 (X = F, O, or OH). The magnetic behavior of all compounds is governed by antiferromagnetic interactions. Interestingly, 3 exhibits a broad maximum in the temperature dependence of the magnetic susceptibility, characteristic of a low-dimensional magnetic system consistent with the presence of Fe–Fe dimers in its crystal structure.
  • Editor: United States: American Chemical Society
  • Idioma: Inglês

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