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

作　　者：BHOWMICK Indrani HARRIS T. David DECHAMBENOIT Pierre HILLARD Elizabeth A. PICHON Cline JEON Ie-Rang CLéRAC Rodolphe 

机构地区：[1]CNRS, CRPP, UPR 8641, F-33600 Pessac, France [2]Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France [3]Department of Chemistry, University of California, Berkeley, California 94720, USA

出　　处：《Science China Chemistry》2012年第6期1004-1011,1192-1197,共8页中国科学（化学英文版）

基　　金：supported by the Centre National de la Recherche Scientifique (CNRS);the University of Bordeaux;the Conseil Régional d'Aqui-taine;GIS Advanced Materials in Aquitaine (COMET Project);the ANR(NT09_469563, AC-MA Gnets project);the Erasmus Mundus Mobilitywith Asia (EMMA) program (External Cooperation Window-ASIE) for the PhD fellowship of I. B.

摘　　要：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.Three new cyanido-bridged heterometallic ReIVNiII and ReIVCuII 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 [ReⅣCl4(CN)2]2- and [MⅡ(cyclam)]2+ (M = Ni in 1, Cu in 2) or [CuⅡ(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 ReIV centers and the 3d metal ions: S = 1 NiII 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 

分 类 号：O611.3[理学—无机化学]