当前位置: X-MOL 学术J. Am. Chem. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A High-Performance Single-Molecule Magnet Utilizing Dianionic Aminoborolide Ligands
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2022-09-26 , DOI: 10.1021/jacs.2c06698
James C Vanjak 1 , Branford O Wilkins 1 , Veacheslav Vieru 2 , Nattamai S Bhuvanesh 1 , Joseph H Reibenspies 1 , Caleb D Martin 3 , Liviu F Chibotaru 4 , Michael Nippe 1
Affiliation  

The first example of a homoleptic f-block borolide sandwich complex is presented and shown to be a high-performance single-molecule magnet (SMM). The bis(borolide) complex [K(2.2.2)][[1-(piperidino)-2,3,4,5-tetraphenylborolyl]2Dy] (1) features an unusual example of an anionic Ln3+ metallocene that supports short metal–ligand bonds and a high degree of linearity around the central Dy3+ ion, resulting in comparatively large barriers to magnetization reversal (Ueff = 1600 cm–1 for the most linear orientation) and, importantly, a high blocking temperature (TB, defined as T100s)) of 66 K. These metrics put complex 1 among the very best performing SMMs reported to date and highlight the potential of dianionic borolide ligands to increase ligand field axiality, compared to monoanionic cyclic ligands, to ultimately maximize magnetic anisotropy in f-block-based SMMs.

中文翻译:

利用双阴离子氨基硼内酯配体的高性能单分子磁体

提出了同配型 f-block 硼化物夹层复合物的第一个例子,并证明它是一种高性能单分子磁体 (SMM)。双(硼化物)配合物 [K(2.2.2)][[1-(哌啶基)-2,3,4,5-四苯基硼基] 2 Dy] ( 1 ) 是阴离子 Ln 3+茂金属的一个不寻常的例子支持短金属-配体键和中心 Dy 3+离子周围的高度线性,导致磁化反转的势垒相对较大(U eff = 1600 cm –1用于最线性取向),重要的是,高阻断温度( T B , 定义为T100s)) 为 66 K。这些指标使配合物1成为迄今为止报告的性能最好的 SMM 之一,并突出了与单阴离子环状配体相比,双阴离子硼化物配体增加配体场轴性的潜力,最终使 f-block- 中的磁各向异性最大化基于 SMM。
更新日期:2022-09-26
down
wechat
bug