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Cyanido-bridged one-dimensional systems assembled from [Re~ⅣCl_4(CN)_2]_(2-) and [M~Ⅱ(cyclam)]^(2+) (M=Ni,Cu) precursors

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Science China Chemistry 2012年第6期55卷 1004-1011,1192-1197页

作者： BHOWMICK Indrani HARRIS T. David dechambenoit pierre HILLARD Elizabeth A. PICHON Cline JEON Ie-Rang CLéRAC Rodolphe CNRS CRPP UPR 8641 F-33600 Pessac France Univ. Bordeaux CRPP UPR 8641 F-33600 Pessac France Department of Chemistry University of California Berkeley California 94720 USA

Three new cyanido-bridged heterometallic ReIVNin and ReIVCu one-dimensional systems were synthesized and extensively characterized both structurally and magnetically. Single-crystal X-ray diffraction analysis revealed that these compounds display a common topology, with chains composed of alternating [RetVc14（CN）2]2- and [Mn（cyclam）]2＋（M = Ni in 1, Cu in 2） or [Cull（N,N＇-dimethylcyclam）]2＋（in 3） building units. Two different chain orientations with a tilt angle of ca. 51° to 55° are present in the crystal packing of these compounds. The magnetic susceptibility measurements suggest the presence of intrachain ferromagnetic interactions between the S = 3/2 ReTM centers and the 3d metal ions： S = 1 Ni1I or S = 1/2 CuII. At low temperature, a three-dimensional ordered magnetic phase induced by interchain antiferromagnetic interactions （antiferromagnetic for 1 and 2; canted antiferromagnetic for 3） is detected for the three compounds.

关键词： molecular magnets cyanido-based materials crystal structure magnetic properties

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Cyanido-bridged one-dimensional systems assembled from [Re~ⅣCl4(CN)2]2- and [M~Ⅱ(cyclam)]2+ (M = Ni, Cu) precursors

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中国科学:化学 2012年第6期42卷 913-915页

作者： BHOWMICK Indrani HARRIS T. David dechambenoit pierre HILLARD Elizabeth A. PICHON Céline JEON Ie-Rang CLRAC Rodolphe CNRS CRPP UPR 8641 F-33600 Pessac France Univ. Bordeaux CRPP UPR 8641 F-33600 Pessac France Department of Chemistry University of California Berkeley California 94720 USA

Three new cyanido-bridged heterometallic Re~ⅣNi~Ⅱ and Re~ⅣCu~Ⅱone-dimensional systems were synthesized and extensively characterized both structurally and magnetically. Single-crystal X-ray diffraction analysis revealed that these compounds display a common topology, with chains composed of alternating [Re~ⅣCl4(CN)2]and [M~Ⅱ(cyclam)](M = Ni in 1, Cu in 2) or [Cu~Ⅱ(N,N′-dimethylcyclam)](in 3) building units. Two different chain orientations with a tilt angle of ca. 51° to 55° are present in the crystal packing of these compounds. The magnetic susceptibility measurements suggest the presence of intrachain ferromagnetic interactions between the S = 3/2 Re~Ⅳcenters and the 3d metal ions: S = 1 Ni~Ⅱ or S = 1/2 Cu~Ⅱ. At low temperature, a three-dimensional ordered magnetic phase induced by interchain antiferromagnetic interactions (antiferromagnetic for 1 and 2; canted antiferromagnetic for 3) is detected for the three compounds.

关键词： molecular magnets cyanido-based materials crystal structure magnetic properties

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