Rational self-assembly of tricobalt extended metal atom chains and [MF6]2– building blocks into one-dimensional coordination polymers - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Journal of Inorganic Chemistry Année : 2018

Rational self-assembly of tricobalt extended metal atom chains and [MF6]2– building blocks into one-dimensional coordination polymers

Résumé

Following our recent work on the first crystallographically characterized coordination polymers based on tricobalt extended metal atom chains (EMACs), namely, [Co3(dpa)4MF6]·2DMF [M = ZrIV (1), SnIV (2), and ReIV (3); Hdpa = 2,2′-dipyridylamine; DMF = N,N′-dimethylformamide], we have generalized our synthetic approach based on robust fluoride complexes to prepare new self-assembled one-dimensional (1D) polymers formed by [Co3(dpa)4]2+ and 5d [MF6]2– [M = IrIV (4) and OsIV (5)] building blocks. These 1D complexes are isostructural and crystallize in the P4/ncc space group such that the fourfold axis is coincident with the metal axes of the rigorously linear chains. Magnetic studies reveal ferromagnetic coupling between the S = 1/2 {Co3} and [MF6]2– units in 3 and 4, whereas the nonmagnetic [MF6]2– linkers of 1 and 5 mediate antiferromagnetic coupling between the {Co3} spins. For 2, no significant exchange coupling was observed. Spin-crossover behavior, which was observed for the parent [Co3(dpa)4Cl2] complex, was not detected for 1–5 up to 300 K. This work demonstrates that EMACs and [MF6]2– complexes can be considered as appealing building blocks for the design of new functional coordination networks.
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Dates et versions

hal-01708996 , version 1 (05-07-2018)

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Miguel Cortijo, Vladimir Bulicanu, Kasper S. Pedersen, Mathieu Rouzières, Jesper Bendix, et al.. Rational self-assembly of tricobalt extended metal atom chains and [MF6]2– building blocks into one-dimensional coordination polymers. European Journal of Inorganic Chemistry, 2018, Molecular magnetism, 3-4, pp.320-325. ⟨10.1002/ejic.201701084⟩. ⟨hal-01708996⟩
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