Tuning slow magnetic relaxation behaviour in a {Dy(2)}-based one-dimensional chain via crystal field perturbation.
Tuning slow magnetic relaxation behaviour in a {Dy(2)}-based one-dimensional chain via crystal field perturbation.
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通过晶体场扰动调节基于 {Dy-2} 的一维链中的慢磁弛豫行为
作者：
在溶剂热条件下合成了两个新的{Dy 2}基一维链状化合物{[Dy 2（H3 L）4（OAc）6]·2 MeOH}n（1）和{[Dy 2（H3 L）4（OAc）4（NCS）2]·2 MeOH}n（2）（H3 L = 1，3-二（2-羟基萘甲撑氨基）-丙-2-醇）.晶体结构分析表明，1和2具有类似的一维链状结构，含有双核二级结构单元。这两种结构之间的区别在于1中Dy（iii）离子的一个螯合乙酸配体被2中的一个单齿配位NCS−离子取代，导致它们与Dy（iii）离子的配位数和几何构型不同。磁性研究表明，1和2表现出缓慢的磁弛豫行为，其有效能垒分别为16.44（2）K和8.02（2）K，这可能是由于Dy（iii）离子对晶场的微扰所致.制备了两种结构相似的{Dy 2}基一维链状化合物，Dy（iii）离子的微小晶场可以干扰它们的慢磁弛豫行为。
Two novel {Dy2}-based one dimensional chain compounds {[Dy2(H3L)4(OAc)6]·2MeOH}n (1) and {[Dy2(H3L)4(OAc)4(NCS)2]·2MeOH}n (2) (H3L = 1,3-bis(2-hydroxynaphthalenemethyleneamino)-propan-2-ol) have been prepared under solvothermal conditions. Crystal structure analyses indicate that 1 and 2 feature similar 1D chain structures bearing dinuclear secondary building units. The difference between these two structures is that one chelated acetate ligand of Dy(iii) ion in 1 is replaced by one monodentate coordinated NCS− ion in 2, leading to their different coordination numbers and geometry configurations to Dy(iii) ion. Magnetic properties indicate that 1 and 2 display slow magnetic relaxation behavior with an effective energy barrier of 16.44(2) K in 1 and 8.02(2) K in 2, respectively, which is maybe attributed to the subtle crystal field perturbation of Dy(iii) ions. Two novel {Dy2}-based one dimensional chain compounds with similar structures have been prepared and subtle crystal field of Dy(iii) ion can perturb their slow magnetic relaxation behaviors.
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影响因子：
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作者：
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