An S = 3 cyanide-bridged tetranuclear FeIII2Ni II2 square that exhibits slow relaxation of magnetization: Synthesis, structure and magnetic properties

Dayu Wu; Yanjuan Zhang; Wei Huang; Osamu Sato

doi:10.1039/b925698a

An S = 3 cyanide-bridged tetranuclear Fe^III₂Ni ^II₂ square that exhibits slow relaxation of magnetization: Synthesis, structure and magnetic properties

Dayu Wu, Yanjuan Zhang, Wei Huang, Osamu Sato

Department of Fundamental Organic Chemistry

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

The reaction of [Ni^II(dpa)₂(solvent)]²⁺ (dpa = 2,2′-dipyridyl amine) with [Bu₄N][(pzTp)Fe ^III(CN)₃] (Bu₄N⁺ = tetrabutylammonium cation; pzTp = tetrakis(pyrazolyl)borate) in MeOH affords a tetranuclear cyano-bridged cluster, [(pzTp)₂Fe₂Ni ₂(dpa)₂(CN)₆](ClO₄) ₂·2CH₃OH·6H₂O (1). Single-crystal X-ray analysis reveals that it is a quasi-square structure with the lateral distance being ca. 5.1 Å, in which two opposing dpa-ligated Ni ^II ions (S = 1) are linked through cyanide bridges to two pzTp-ligated Fe^III (S = 1/2) centers at the corner sites. Magnetic studies for complex 1 show ferromagnetic coupling (J/k = 10.12 K) giving rise to an S = 3 ground state; ac magnetic susceptibility measurements performed on sample 1 showed evidence of the slow relaxation effects possibly associated with single-molecule magnet behavior.

Original language	English
Pages (from-to)	5500-5503
Number of pages	4
Journal	Dalton Transactions
Volume	39
Issue number	23
DOIs	https://doi.org/10.1039/b925698a
Publication status	Published - Jun 21 2010

All Science Journal Classification (ASJC) codes

Inorganic Chemistry

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title = "An S = 3 cyanide-bridged tetranuclear FeIII2Ni II2 square that exhibits slow relaxation of magnetization: Synthesis, structure and magnetic properties",

abstract = "The reaction of [NiII(dpa)2(solvent)]2+ (dpa = 2,2′-dipyridyl amine) with [Bu4N][(pzTp)Fe III(CN)3] (Bu4N+ = tetrabutylammonium cation; pzTp = tetrakis(pyrazolyl)borate) in MeOH affords a tetranuclear cyano-bridged cluster, [(pzTp)2Fe2Ni 2(dpa)2(CN)6](ClO4) 2·2CH3OH·6H2O (1). Single-crystal X-ray analysis reveals that it is a quasi-square structure with the lateral distance being ca. 5.1 {\AA}, in which two opposing dpa-ligated Ni II ions (S = 1) are linked through cyanide bridges to two pzTp-ligated FeIII (S = 1/2) centers at the corner sites. Magnetic studies for complex 1 show ferromagnetic coupling (J/k = 10.12 K) giving rise to an S = 3 ground state; ac magnetic susceptibility measurements performed on sample 1 showed evidence of the slow relaxation effects possibly associated with single-molecule magnet behavior.",

author = "Dayu Wu and Yanjuan Zhang and Wei Huang and Osamu Sato",

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doi = "10.1039/b925698a",

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T1 - An S = 3 cyanide-bridged tetranuclear FeIII2Ni II2 square that exhibits slow relaxation of magnetization

T2 - Synthesis, structure and magnetic properties

AU - Wu, Dayu

AU - Zhang, Yanjuan

AU - Huang, Wei

AU - Sato, Osamu

PY - 2010/6/21

Y1 - 2010/6/21

N2 - The reaction of [NiII(dpa)2(solvent)]2+ (dpa = 2,2′-dipyridyl amine) with [Bu4N][(pzTp)Fe III(CN)3] (Bu4N+ = tetrabutylammonium cation; pzTp = tetrakis(pyrazolyl)borate) in MeOH affords a tetranuclear cyano-bridged cluster, [(pzTp)2Fe2Ni 2(dpa)2(CN)6](ClO4) 2·2CH3OH·6H2O (1). Single-crystal X-ray analysis reveals that it is a quasi-square structure with the lateral distance being ca. 5.1 Å, in which two opposing dpa-ligated Ni II ions (S = 1) are linked through cyanide bridges to two pzTp-ligated FeIII (S = 1/2) centers at the corner sites. Magnetic studies for complex 1 show ferromagnetic coupling (J/k = 10.12 K) giving rise to an S = 3 ground state; ac magnetic susceptibility measurements performed on sample 1 showed evidence of the slow relaxation effects possibly associated with single-molecule magnet behavior.

AB - The reaction of [NiII(dpa)2(solvent)]2+ (dpa = 2,2′-dipyridyl amine) with [Bu4N][(pzTp)Fe III(CN)3] (Bu4N+ = tetrabutylammonium cation; pzTp = tetrakis(pyrazolyl)borate) in MeOH affords a tetranuclear cyano-bridged cluster, [(pzTp)2Fe2Ni 2(dpa)2(CN)6](ClO4) 2·2CH3OH·6H2O (1). Single-crystal X-ray analysis reveals that it is a quasi-square structure with the lateral distance being ca. 5.1 Å, in which two opposing dpa-ligated Ni II ions (S = 1) are linked through cyanide bridges to two pzTp-ligated FeIII (S = 1/2) centers at the corner sites. Magnetic studies for complex 1 show ferromagnetic coupling (J/k = 10.12 K) giving rise to an S = 3 ground state; ac magnetic susceptibility measurements performed on sample 1 showed evidence of the slow relaxation effects possibly associated with single-molecule magnet behavior.

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An S = 3 cyanide-bridged tetranuclear Fe^III₂Ni ^II₂ square that exhibits slow relaxation of magnetization: Synthesis, structure and magnetic properties

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