A molecular dysprosium(III) complex [Dy(DClQ)₃(H₂O)₂] (1) was used as a building unit for the construction of lanthanide SMMs, leading to the isolation of two dinuclear Dy(III) complexes, namely [Dy₂(DClQ)₆(MeOH)₂] (2) and [Dy₂(DClQ)₆(bpmo)₂]·6MeCN (3) (DClQ = 5,7-dichloro-8-hydroxyquinoline, bpmo = 4,4′-dipyridine-oxide). Structural analyses revealed the same N₃O₅ coordination environment of the Dy(III) centers with a distorted biaugmented trigonal prism (C_2V symmetry) and triangular dodecahedron (D_2d symmetry) for 2 and 3, respectively. Magnetic studies revealed the presence of ferromagnetic and weak antiferromagnetic exchange interactions between the Dy³⁺ centers in 2 and 3, respectively. Interestingly, slow relaxation of magnetization at zero fields was evidenced with an U_eff of 51.4 K and 159.0 K for complexes 2 and 3, respectively. The detailed analysis of relaxation dynamics discloses that the Orbach process is dominant for 2 whereas Raman and QTM play an important role in 3. Theoretical calculations were carried out to provide insight into the magnetic exchange interactions and relaxation dynamics for the complexes. Due to a single-ion magnet (SIM) of 1, the foregoing results demonstrate a SIM modular synthetic route for the preparation of dinuclear lanthanide SMMs.

中文翻译：

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具有增强磁性能的 Dy2 单分子磁体的单离子磁体构建块策略

分子镝 ( III ) 络合物 [Dy(DClQ) ₃ (H ₂ O) ₂ ] ( 1 ) 用作构建镧系元素 SMM 的构建单元，导致两个双核 Dy( III ) 络合物的分离，即[Dy ₂ (DClQ) ₆ (MeOH) ₂ ] ( 2 ) 和 [Dy ₂ (DClQ) ₆ (bpmo) ₂ ]·6MeCN ( 3 ) ( DClQ = 5,7-二氯-8-羟基喹啉, bpmo = 4, 4'-氧化二吡啶）。结构分析揭示了相同的 N ₃ O ₅Dy( III ) 中心的配位环境分别为2和3具有扭曲的双增三角棱柱（C _2V对称性）和三角十二面体（D _2d对称性） 。磁性研究表明，在2和3中的 Dy ³⁺中心之间分别存在铁磁和弱反铁磁交换相互作用。有趣的是，配合物2和3的U _eff分别为 51.4 K 和 159.0 K，证明了零场磁化的缓慢弛豫， 分别。弛豫动力学的详细分析表明，Orbach 过程对2起主导作用，而拉曼和 QTM 在3中起重要作用。进行了理论计算以深入了解复合物的磁交换相互作用和弛豫动力学。由于1的单离子磁体 (SIM) ，上述结果证明了用于制备双核镧系元素 SMM 的 SIM 模块化合成路线。