在基于镝的一维链晶体场微扰中调节慢磁弛豫行为。
Tuning slow magnetic relaxation behaviour in a {Dy}-based one-dimensional chain crystal field perturbation.
作者信息
Yu Shui, Zhang Qinhua, Hu Huancheng, Chen Zilu, Liu Dongcheng, Liang Yuning, Liang Fupei
机构信息
State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University Guilin 541004 P. R. China
State Key Laboratory of Heavy Oil Processing, Institute of New Energy, College of Chemical Engineering, China University of Petroleum (East China) Qingdao 266580 P. R. China.
出版信息
RSC Adv. 2020 Mar 24;10(20):11831-11835. doi: 10.1039/d0ra01604g. eCollection 2020 Mar 19.
Two novel {Dy}-based one dimensional chain compounds {[Dy(HL)(OAc)]·2MeOH} (1) and {[Dy(HL)(OAc)(NCS)]·2MeOH} (2) (HL = 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.
在溶剂热条件下制备了两种新型的基于镝的一维链状化合物{[Dy(HL)(OAc)]·2MeOH} (1) 和{[Dy(HL)(OAc)(NCS)]·2MeOH} (2)（HL = 1,3-双(2-羟基萘基亚甲基氨基)-丙-2-醇）。晶体结构分析表明，1和2具有相似的带有双核二级构筑单元的一维链状结构。这两种结构的区别在于，1中Dy(iii)离子的一个螯合乙酸根配体被2中的一个单齿配位的NCS离子取代，导致它们对Dy(iii)离子的配位数和几何构型不同。磁性研究表明，1和2分别表现出缓慢的磁弛豫行为，其有效能垒在1中为16.44(2) K，在2中为8.02(2) K，这可能归因于Dy(iii)离子的细微晶体场扰动。
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