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Article Dans Une Revue Journal of Solid State Chemistry Année : 2021

Open-framework transition metal fluorophosphates with one-dimensional antiferromagnetic chains

Résumé

Two open frameworks fluorophosphates materials (NH4)2M2F2(PO4)(PO3F)OH (M ​= ​Fe and V) have been synthesized via fluoride-rich hydrothermal routes at 493 ​K. The two isostructural compounds revealed three-dimensional (3D) frameworks, composed of trans-MO4F2, cis-MO4F2, trans-MO2F2(OH)2 octahedra, and PO4, PO3F and NH4 tetrahedra. The anionic backbone of (NH4)2M2F2(PO4)(PO3F)OH consists of a series of parallel zigzag [M2F2O7OH] chains cross-connected with each other, bridged by PO4 tetrahedra within two-dimensional (2D) layer, and bridged by PO3F groups vertical to 2D layer. It generates a three 3D open framework. The XPS spectra revealed the valence of Fe and V are III in the corresponding compounds. The isostructural compounds feature transition metal zigzag chains, which promotes robust antiferromagnetic (AFM) interactions in (NH4)2Fe2F2(PO4)(PO3F)OH in contrast to weak AFM in (NH4)2V2F2(PO4)(PO3F)OH.
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Dates et versions

hal-04448331 , version 1 (09-02-2024)

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Y. Jin, X. N. Zhang, T. Y. Zhu, H. M. Yang, Olivier Mentre, et al.. Open-framework transition metal fluorophosphates with one-dimensional antiferromagnetic chains. Journal of Solid State Chemistry, 2021, Journal of solid state chemistry, 304, pp.122526. ⟨10.1016/j.jssc.2021.122526⟩. ⟨hal-04448331⟩
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