具有缓慢磁化弛豫的俄罗斯套娃式3d-4f簇轮
Russian Doll-like 3d-4f Cluster Wheels with Slow Relaxation of Magnetization.
作者信息
Liu Lan, Yang Panpan, Qiu Zhihui, Wang Kai, Liu Dongcheng, Liang Yuning, Hu Huancheng, Zou Huahong, Liang Fupei, Chen Zilu
机构信息
School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.
Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
出版信息
Molecules. 2023 Aug 6;28(15):5906. doi: 10.3390/molecules28155906.
The solvothermal reactions of LnCl·6HO and MCl·6HO (M = Co, Ni) with 2,2'-diphenol (HL) and 5,7-dichloro-8-hydroxyquinoline (HL) gave three 3d-4f heterometallic wheel-like nano-clusters [LnM(L)(L)(-OH)(OCH)Cl(CHCN)]Cl·HO (Ln = Dy, M = Co, = 3 for ; Ln = Dy, M = Ni, = 0 for ; Ln = Tb, M = Ni, = 0 for ) with similar cluster structure. The innermost Ln(III) ion is encapsulated in a planar Ln ring which is further embedded in a chair-conformation M ring, constructing a Russian doll-like 3d-4f cluster wheel Ln(III)⸦Ln⸦M. and show obvious slow magnetic relaxation behavior with negligible opening of the magnetic hysteresis loop. Such a Russian doll-like 3d-4f cluster wheel with the lanthanide disc isolated by transition metallo-ring is rarely reported.
LnCl₃·6H₂O 和 MCl₂·6H₂O（M = Co、Ni）与 2,2'-联苯酚（HL）和 5,7-二氯-8-羟基喹啉（HL）的溶剂热反应得到了三个具有相似簇结构的 3d-4f 异金属轮状纳米簇[LnM(L)(L')(-OH)(OCH₃)Cl(CH₃CN)]Cl·H₂O（Ln = Dy，M = Co，对于 来说 = 3；Ln = Dy，M = Ni，对于 来说 = 0；Ln = Tb，M = Ni，对于 来说 = 0）。最内层的 Ln(III)离子被包裹在一个平面的 Ln 环中，该环进一步嵌入到一个椅式构象的 M 环中，构建了一个俄罗斯套娃式的 3d-4f 簇轮 Ln(III)⸦Ln⸦M。 和 表现出明显的慢磁弛豫行为，磁滞回线的开口可忽略不计。这种由过渡金属环隔离镧系圆盘的俄罗斯套娃式 3d-4f 簇轮鲜有报道。
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