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A new series of layered transition metal oxalates: hydrothermal synthesis, structural and magnetic studies

A new series of layered transition metal oxalates: hydrothermal synthesis, structural and magnetic studies
A new series of layered transition metal oxalates: hydrothermal synthesis, structural and magnetic studies
The hydrothermal synthesis and crystallographic study of a new family of isostructural transition metal oxalate compounds, Ba2M2(ox)(3)Cl-2(H2O)(4) (M = Mn(II) (1), Fe(II) (2) or Co(II) (3)) is reported. The crystal structure has C2/c symmetry and contains two types of oxalate. These dianionic ligands bridge the transition metal ions in two different modes, which together form a 2-D net comprised of linked chains of transition metal ions. The iron derivative shows strong evidence of antiferromagnetic coupling interactions and significant short-range magnetic order at low temperatures but there is no evidence of long-range ordering above 2 K. Attempts to fit the observed magnetic susceptibility to several approximate models is reviewed. The Co derivative also shows antiferromagnetic coupling and additionally appears to have a magnetic phase transition at about 11(1) K.
directing organic amines, open-framework, ferrimagnets, diffraction, networks, channels, complex, crystal, cation
1477-9226
2478-2482
Price, Daniel J.
479ee5e3-2626-4abe-bffa-679d77ba5192
Powell, Annie K.
84c3aa9f-b469-489c-a4d7-264c4ec39e44
Wood, Paul T.
e6981f20-68c2-4263-bbe4-ff15eb205424
Price, Daniel J.
479ee5e3-2626-4abe-bffa-679d77ba5192
Powell, Annie K.
84c3aa9f-b469-489c-a4d7-264c4ec39e44
Wood, Paul T.
e6981f20-68c2-4263-bbe4-ff15eb205424

Price, Daniel J., Powell, Annie K. and Wood, Paul T. (2003) A new series of layered transition metal oxalates: hydrothermal synthesis, structural and magnetic studies. Dalton Transactions, (12), 2478-2482. (doi:10.1039/b301658g).

Record type: Article

Abstract

The hydrothermal synthesis and crystallographic study of a new family of isostructural transition metal oxalate compounds, Ba2M2(ox)(3)Cl-2(H2O)(4) (M = Mn(II) (1), Fe(II) (2) or Co(II) (3)) is reported. The crystal structure has C2/c symmetry and contains two types of oxalate. These dianionic ligands bridge the transition metal ions in two different modes, which together form a 2-D net comprised of linked chains of transition metal ions. The iron derivative shows strong evidence of antiferromagnetic coupling interactions and significant short-range magnetic order at low temperatures but there is no evidence of long-range ordering above 2 K. Attempts to fit the observed magnetic susceptibility to several approximate models is reviewed. The Co derivative also shows antiferromagnetic coupling and additionally appears to have a magnetic phase transition at about 11(1) K.

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Published date: 2003
Keywords: directing organic amines, open-framework, ferrimagnets, diffraction, networks, channels, complex, crystal, cation

Identifiers

Local EPrints ID: 20069
URI: http://eprints.soton.ac.uk/id/eprint/20069
ISSN: 1477-9226
PURE UUID: 19498e90-d189-4174-8cd4-e360aac7f35c

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Date deposited: 24 Feb 2006
Last modified: 15 Mar 2024 06:21

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Contributors

Author: Daniel J. Price
Author: Annie K. Powell
Author: Paul T. Wood

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