镝
等结构
硫氰酸盐
结晶学
磁性
离子
镧系元素
化学
磁化
反铁磁性
单晶
放松(心理学)
材料科学
晶体结构
凝聚态物理
无机化学
磁场
物理
有机化学
社会心理学
量子力学
心理学
作者
Qingyun Wan,Mirosław Arczyński,Masanori Wakizaka,Shraddha Gupta,Nobuto Funakoshi,Masahiro Yamashita
出处
期刊:Chemistry
[Multidisciplinary Digital Publishing Institute]
日期:2023-04-26
卷期号:5 (2): 987-995
被引量:3
标识
DOI:10.3390/chemistry5020067
摘要
New three-dimensional (3D) lanthanide framework compounds supported by bridging thiocyanate ligand and K+ cations, K4[Ln(NCS)4(H2O)4](NCS)3(H2O)2(1: Ln = Dy, 2: Ln = Tb, 3: Ln = Gd) have been synthesized. A single-crystal X-ray diffraction study showed that all three compounds were isostructural and crystallized in the I 2/a space group. The K+ ion form 2D layers with thiocyanates which are further linked by [Ln(NCS)4(H2O)4]- complexes and additional thiocyanate ions to generate an interesting 3D framework structure. Compound 1 shows slow magnetic relaxation behavior under a zero direct current (DC) field, indicating that 1 behaves as a single-ion magnet (SIM). As estimated from AC magnetic measurements, the effective energy barrier for spin reversal in 1 was Ueff = 42 cm–1. Slow relaxation of magnetization under a small external DC field was also detected for 2 and 3 at 1.8 K.
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