Cyanide-bridged 1D Mn(III)–Fe(III) bimetallic complexes: synthesis, crystal structure and magnetic properties
Cyanide-bridged 1D Mn(III)–Fe(III) bimetallic complexes: synthesis, crystal structure and magnetic properties
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DOI：
10.1039/b9nj00316a
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发表时间：
2009-11
影响因子：
3.3
通讯作者：
H. Kou;Zhonghai Ni;Caiming Liu;Deqing Zhang;A. Cui
中科院分区：
文献类型：
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作者：
H. Kou;Zhonghai Ni;Caiming Liu;Deqing Zhang;A. Cui
为了寻找具有有趣磁性的新分子材料，人们合成了氰化物桥连的 Mn(III)-Fe(III) 配合物。反式二氰基铁氧体(III)的一维络合物，[Mn(5-Cl-salen)Fe(bpClb)(CN)2]·0.67MeCN·0.5H2O (1)，[Mn(5-Cl-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH (2)，制备了[Mn(5-Br-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH (3)和[Mn(5-Me-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH (4)，并通过X射线单晶结构分析和磁测量对其进行了表征。所有配合物都具有交替的 [Mn(5-R-salen)]+ 和 [Fe(bpRb)(CN)2]− 单元的一维链，这些单元通过 [Fe(bpRb)(CN)2]− 的两个反式氰化物配体连接。磁性研究表明，它们表现出整体金属间铁磁耦合，而配合物 4 显示出单链磁体典型的频率依赖性交流磁化率。
Cyanide-bridged Mn(III)–Fe(III) complexes have been synthesized in order to find new molecular materials with interesting magnetic properties. 1D complexes of trans-dicyanoferrite(III), [Mn(5-Cl-salen)Fe(bpClb)(CN)2]·0.67MeCN·0.5H2O (1), [Mn(5-Cl-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH (2), [Mn(5-Br-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH (3), and [Mn(5-Me-salen)Fe(bpb)(CN)2]·0.5H2O·MeOH (4) have been prepared and characterized by X-ray single-crystal structure analysis and magnetic measurements. All complexes possesses 1D chains of alternate [Mn(5-R-salen)]+ and [Fe(bpRb)(CN)2]− units that are linked by two trans-cyanide ligands of [Fe(bpRb)(CN)2]−. Magnetic studies reveal that they exhibit overall intermetallic ferromagnetic coupling, while complex 4 shows a frequency-dependent AC magnetic susceptibility typical of a single-chain magnet.