Controllable antiferromagnetic to ferromagnetic coupling in polynuclear Fe(III)–Co(II) heterobimetallic complexes

A tetranuclear cluster {[(Tp)Fe(CN)3]Co(pp)H2O}2·[(Tp)Fe(CN)3]2⋅6H2O (1; Tp=hydrotris(pyrazoly)borate, pp=2,6-bis(N-pyrazolyl)pyridine) and a hexanuclear cluster {[(pzTp)Fe(CN)3]2Co(pp)}2·2H2O (2; pzTp=tetrakis(pyrazoly)borate) have been synthesized via rational assembly of the same (ppCoII)2+ unit...

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Bibliographic Details
Published in:Inorganic chemistry communications 2017-02, Vol.76, p.55-58
Main Authors: Wang, Jun-Li, Zhu, Hai-Lang, Zhao, Liang, Ren, Ling-Xiang, Duan, Chun-Ying, Liu, Tao
Format: Article
Language:English
Subjects:
Antiferromagnetic
Ferromagnetic
Heterobimetallic system
Polynuclear
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Summary:A tetranuclear cluster {[(Tp)Fe(CN)3]Co(pp)H2O}2·[(Tp)Fe(CN)3]2⋅6H2O (1; Tp=hydrotris(pyrazoly)borate, pp=2,6-bis(N-pyrazolyl)pyridine) and a hexanuclear cluster {[(pzTp)Fe(CN)3]2Co(pp)}2·2H2O (2; pzTp=tetrakis(pyrazoly)borate) have been synthesized via rational assembly of the same (ppCoII)2+ unit and different tricyanometalate building blocks with varying proportions of sterically hindered groups. Magnetic measurements reveal that 1 exhibits the dominant antiferromagnetic interactions between Fe(III) and Co(II) ions, while 2 exhibits the dominant ferromagnetic interactions. From a tetranuclear Fe2Co2 cluster to a hexanuclear Fe4Co2 cluster was synthesized based on different cyanometalate building blocks with varying proportions of sterically hindered groups. The corresponding magnetic properties change from antiferromagnetic interaction to ferromagnetic interaction. [Display omitted] •A tetranuclear FeIII2CoII2 cluster and a hexanuclear cluster FeIII4CoII2 were synthesized.•Antiferromagnetic to ferromagnetic coupling were achieved.
ISSN:1387-7003
1879-0259
DOI:10.1016/j.inoche.2017.01.013