Lanthanide Metal-Organic Frameworks Assembled from Unexplored Imidazolylcarboxylic Acid: Structure and Field-Induced Two-Step Magnetic Relaxation.,Inorganic Chemistry

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Lanthanide Metal-Organic Frameworks Assembled from Unexplored Imidazolylcarboxylic Acid: Structure and Field-Induced Two-Step Magnetic Relaxation.
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-08-12 , DOI: 10.1021/acs.inorgchem.0c01855
Yuewei Wu ₁ , Yuting Zhou ₁ , Senni Cao ₁ , Peipei Cen ₂ , Yi-Quan Zhang ₃ , Jinhui Yang ₁ , Xiangyu Liu _{1,

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Affiliation

A series of 3D homologous metal–organic frameworks, [M(H_0.5L)₂] [M = Dy (1), Ho (2), Yb (3), Sm (4), Gd (5), and Y (6); H₂L = 5-(1H-imidazol-1-yl)isophthalic acid], were isolated. In these complexes, the metal centers behave as hexacoordinated environments with distorted octahedral geometries, which is unusual in the lanthanide series, linking to each other and producing a fascinating 3D architecture. Magnetically, 1 features a field-driven dual-magnetic relaxation, which is rarely observed in high-dimensional coordination polymers. Analysis on the dilution sample (1@Y) and ab initio calculation unveil that the thermally assisted slow relaxation is mostly caused by the single-ion magnetism of Dy^III itself.

中文翻译：

由未开发的咪唑基羧酸组装而成的镧系金属有机骨架：结构和磁场诱导的两步磁弛豫。

一系列3D同源金属有机框架，[M（H _0.5 L）₂ ] [M = Dy（1），Ho（2），Yb（3），Sm（4），Gd（5）和Y（6）; 分离出H ₂ L ＝ 5-（1H-咪唑-1-基）间苯二甲酸。在这些配合物中，金属中心表现为八面体几何形状扭曲的六配位环境，这在镧系元素中是不常见的，它们相互连接并产生引人入胜的3D结构。磁性地，1具有磁场驱动的双磁弛豫特性，这在高维配位聚合物中很少观察到。对稀释样品（1Y）的分析和从头算的计算表明，热辅助缓慢弛豫主要是由Dy ^III本身的单离子磁性引起的。

更新日期：2020-08-12

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