An eight-coordinate ytterbium complex with a hexagonal bipyramid geometry exhibiting field-induced single-ion magnet behaviour
An eight-coordinate ytterbium complex with a hexagonal bipyramid geometry exhibiting field-induced single-ion magnet behaviour
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具有六角双锥几何形状的八配位镱络合物，表现出场感应单离子磁体行为
DOI：
10.1039/c9dt00663j
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发表时间：
2019
影响因子：
4
通讯作者：
Luo Cheng Lin
中科院分区：
文献类型：
--
作者：
Zhao Wen;Cui Huihui;Chen Xiao Yun;Yi Gangji;Chen Lei;Yuan Aihua;Luo Cheng Lin
合成了两种同构八配位配合物Ln(NO3)3(tBu3PO)2 (Ln = Yb, 1-Yb; Tb, 2-Tb)，并通过单晶X射线晶体学进行了结构分析。两种配合物均具有近乎完美的六角双锥 LnO8 几何形状，具有理想的 D3h 对称性。磁性测量显示 1-Yb 场引起的慢磁弛豫，从而首次报告了具有六角双锥坐标几何形状的基于 YbIII 的 SIM。相反，2-Tb 没有表现出明显的异相 (χ''M) 交流信号。
Two isostructural eight-coordinate complexes Ln(NO3)3(tBu3PO)2 (Ln = Yb, 1-Yb; Tb, 2-Tb) were synthesized and structurally analyzed by single-crystal X-ray crystallography. Both complexes feature a nearly perfect hexagonal bipyramidal LnO8 geometry with ideal D3h symmetry. Magnetic measurements show field-induced slow magnetic relaxation for 1-Yb, thereby presenting the first report of YbIII-based SIMs with a hexagonal bipyramidal coordinate geometry. In contrast, 2-Tb shows no significant out-of-phase (χ′′M) ac signals.