摘要
作为单分子磁体(SMMs),镧系配合物因在高密度信息存储、量子计算和自旋电子学等多个领域具有潜在的应用的价值而被广泛研究~([1])。由于稀土镝离子具有强的磁各向异性而成为设计合成单分子磁体的良好金属中心。本文以9-蒽酸(9-HAC)和2,2′-联吡啶(2,2′-bipy)为混合配体,通过溶剂热法合成了一个具有中心对称结构的双核镝配合物[Dy_2(2,2′-bipy)_2(9-AC)_6],其结构如Fig 1a所示。交流磁化率测试结果显示,该配合物在零场下出现了明显的频率依赖并出现峰值(Fig 1b),表明具有典型的单分子磁体行为。
A Dy~Ⅲ binuclear complex,[Dy_2(2,2'-bipy)_2(9-AC)_6](9-AC = anthracence-9-carboxylate and 2,2'-bipy =2,2'-bipyridine),was solvothermally synthesized.Structure analyses reveal that the complex exhibits fourfold carboxylate-bridged centrosymmetric dinuclear structure with chelating 2,2'-bipy molecule as terminus.The frequency-dependent ac magnetic susceptibilities were clearly observed under zero dc field,indicating the slow magnetic relaxation behavior.
引文
[1]M.L.Cable,J.P.Kirby,K.Sorasaenee,H.B.Gray and A.Ponce,J.Am.Chem.Soc.,2007,129,1474.