Single-Ion Magnetism in a Three-Dimensional Thiocyanate-Bridged Dysprosium(III) Framework

被引：3

作者：

Wan, Qingyun ^{[1
,2
]}

Arczynski, Miroslaw ^{[1
,3
]}

Wakizaka, Masanori ^{[1
]}

Gupta, Shraddha ^{[1
]}

Funakoshi, Nobuto ^{[1
]}

Yamashita, Masahiro ^{[1
,4
]}

机构：

[1] Tohoku Univ, Grad Sch Sci, Dept Chem, Aoba Ku, Sendai 9808578, Japan

[2] Univ Hong Kong, Dept Chem, State Key Lab Synthet Chem, HKU CAS Joint Lab New Mat, Pokfulam Rd, Hong Kong, Peoples R China

[3] Jagiellonian Univ, Fac Chem, Gronostajowa 2, PL-30387 Krakow, Poland

[4] Nankai Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China

来源：

CHEMISTRY-SWITZERLAND | 2023年 / 5卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Dy(III); 3D coordination framework; SIM; METAL-ORGANIC FRAMEWORK; MAGNETIZATION DYNAMICS; CRYSTAL-STRUCTURE; MOLECULE-MAGNET; RELAXATION;

D O I：

10.3390/chemistry5020067

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

New three-dimensional (3D) lanthanide framework compounds supported by bridging thiocyanate ligand and K+ cations, K-4[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 U-eff = 42 cm(-1). Slow relaxation of magnetization under a small external DC field was also detected for 2 and 3 at 1.8 K.

引用

页码：987 / 995

页数：9