Anion‐Dependent Facile Route to Magnetic Dinuclear and Dodecanuclear Cobalt Clusters
Anion‐Dependent Facile Route to Magnetic Dinuclear and Dodecanuclear Cobalt Clusters
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DOI：
10.1002/ejic.201000222
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发表时间：
2010-05
影响因子：
2.3
通讯作者：
Ling-Ling Zheng-Ling;Ji-Dong Leng;R. Herchel;Yanhua Lan;A. Powell;M. Tong
中科院分区：
文献类型：
--
作者：
Ling-Ling Zheng-Ling;Ji-Dong Leng;R. Herchel;Yanhua Lan;A. Powell;M. Tong
通过不同钴(II)盐与配体(1H-苯并咪唑-2-基)甲醇的反应，轻松合成了前所未有的十二核CoIII3CoII9和双核CoII2簇。 Co12超团簇中的钴离子通过μ3-OL、μ-OL、μ3-O2–、μ1,1-N3–和μ1,1,1-N3–桥连接成盘状结构。磁性研究表明，1 中存在通过双端 (EO) 叠氮桥的强铁磁耦合，而 2 中存在通过 μ3-OL 和 μ-OL 路径的铁磁耦合以及通过 μ1,1,1-N3– 路径的反铁磁耦合，从而导致 2 具有亚铁磁行为。
An unprecedented dodecanuclear CoIII3CoII9 and a dinuclear CoII2 cluster were synthesized facilely from reactions of different coblt(II) salts with the ligand (1H-benzimidazol-2-yl)methanol. The cobalt ions in the Co12 supercluster are linked into a disclike structures through μ3-OL, μ-OL, μ3-O2–, μ1,1-N3– and μ1,1,1-N3– bridges. Magnetic studies reveal that strong ferromagnetic coupling through double end-on (EO) azido bridges exists in 1, while both ferromagnetic coupling through the μ3-OL and μ-OL pathways and antiferromagnetc coupling through the μ1,1,1-N3– pathway exist in 2, which results in a ferrimagnetic behaviour of 2.