solid state. The sodium analog [(thf)3Na(NCOC6H4)2CH] (1′) based on the bis(benzoxazol-2-yl)-methanide ligand (titled “box”) was prepared and analyzed for comparison reasons. From the lanthanide derivatives 2–4, the DyIII complex 3 displays slow relaxation of magnetization at zero field, with a relaxation barrier of U = 315.7 cm–1. The coupling strength between the two lanthanide centers was estimated
由
钠钠前体 [(Na(thf) 6 ][Na(4-Me-NCOC 6 H 3 ) 2 CH} 2 ] ( 1 ) 三同构双核
镧系元素配合物 [(μ-Cl)Ln III (4 -MeNCOC 6 H 3 ) 2 CH} 2 ] 2与 Ln = Gd ( 2 )、Dy ( 3 ) 和 Er ( 4 ) 基于N , N'螯合单阴离子双(4-甲基
苯并恶唑-2-基)合成了
甲烷化物
配体(标题为“Mebox”),并通过 X 射线衍射和磁测量对其进行了表征。通过 X 射线衍射和扩散有序 NMR 光谱实验 (
DOSY-NMR) 对1进行分析,以研究其在溶液中的聚集和固态。出于比较原因,制备并分析了基于双(
苯并恶唑-2-基)-
甲烷配体的
钠类似物[(thf) 3 Na(NCOC 6 H 4 ) 2 CH] ( 1 ')(标题为“box”)。从
镧系元素衍
生物2 – 4来看,Dy III配合物3在零场下表现出缓慢的磁化弛豫,弛豫势垒为U