TOMMASINO, Jean-Bernard; CHASTANET, Guillaume; LE GUENNIC, Boris; ROBERT, Vincent; PILET, Guillaume

doi:10.1039/C2NJ40302A

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TOMMASINO, Jean-Bernard
Laboratoire des Multimatériaux et Interfaces [LMI]

CHASTANET, Guillaume
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

LE GUENNIC, Boris
Institut des Sciences Chimiques de Rennes [ISCR]
Laboratoire de Chimie - UMR5182 [LC]

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New Journal of Chemistry. 2012, vol. 36, n° 11, p. 2228-2235

Royal Society of Chemistry

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An azide-bridged Cu(II) one dimensional polymer was synthesized in a one pot reaction in the presence of ammonia. The refined crystal structure evidenced the unusual asymmetric μ1,1,3 coordination mode of the azide ion leading to a {Cu(μ1,1,3-N3)(μ1-N3)(NH3)0.8(H2O)1.2}n chain. The redox process of this complex was studied by cyclic voltammetry evidencing the Cu(II)/Cu(I) reversibility. Magnetic measurements were interpreted as a uniform antiferromagnetic chain (J = −15.2 cm−1) holding rather strong inter-chain exchange (zJ′ = −2.8 cm−1). Multireference difference dedicated configuration interaction (DDCI) calculations confirmed the non-negligible intensity of inter-chain interactions and evidenced a strong influence of the type of coordinated solvent, NH3 or H2O, on the nature and magnitude of the magnetic exchange.< Réduire

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A 1D coordination polymer built on asymmetric µ1,1,3-azide bridge: from unusual topology to magnetic properties and Cu(II)/Cu(I) redox reversibility

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