The lanthanide complexes [Cp*₂Ln][N,N′-bpy^B] (1: Ln = Dy; 3: Ln = Gd; Cp* = pentamethylcyclopentadienyl) and [222-cryptand-K][(Cp*₂Ln)(N,N′-bpy^B)] (2: Ln = Dy; 4: Ln = Gd) bearing the redox-noninnocent diborane ligand 5,5′-bis(dimesitylboranyl)-2,2′-bipyridine (bpy^B) have been synthesized through selective reduction of bpy^B to the radical anion and diamagnetic dianion states with elemental potassium in the presence of [Cp*₂Ln][BPh₄], respectively. Superconducting quantum interference device (SQUID) measurements revealed that the radical anions and the lanthanide ions in 1 and 3 exhibit an antiferromagnetic interaction. Moreover, the effective energy barrier of magnetic relaxation for 1 (18.5(9) K) is much smaller than that for 2 (77.2(5) K) under a 1 kOe field, highlighting the potential of main-group element-based redox-noninnocent ligands in tuning single-molecule magnetism.

中文翻译：

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通过氧化还原非配位乙硼烷配体调谐配合物的单分子磁性

镧系元素配合物的[Cp * ₂ LN] [ Ñ，Ñ '-bpy^乙]（1：LN =镝; 3：LN =钆;的Cp * =五甲基环戊二烯）和[222-穴状配体-K] [（CP * ₂ LN ）（ñ，ñ '-bpy^乙）]（2：LN =镝; 4：LN = Gd）的轴承的氧化还原noninnocent乙硼烷配位体5,5'-双（dimesitylboranyl）-2,2'-联吡啶（BPY^乙）是通过在[Cp * ₂ Ln] [BPh ₄ ]存在下用元素钾将bpy ^B选择性还原为自由基阴离子和抗磁性双阴离子状态而合成的]， 分别。超导量子干涉仪（SQUID）的测量表明，1和3中的自由基阴离子和镧系元素离子表现出反铁磁相互作用。此外，在1 kOe磁场下，1（18.5（9）K）的磁弛豫有效能垒比2（77.2（5）K）的有效弛豫要小得多，这突出了基于主族元素的氧化还原-调节单分子磁性的非纯配体。