Tuning Quantum Tunneling in Isomorphic {M<sup>II</sup><sub>2</sub>Dy<sup>III</sup><sub>2</sub>} “Butterfly” System via 3d-4f Magnetic Interaction
作者:Gao-Peng Li、Hai-Zhou Tang、Rui-Cheng Gao、Yao-Yu Wang、Xin Sun、Kun Zhang
DOI:10.1021/acs.cgd.2c01198
日期:2023.3.1
In order to probe the magnetic relaxation mechanism of 3d-4f complexes systematically, two “Butterfly” MII2DyIII2 complexes related to our previously reported butterfly compound, [Zn2Dy2(L)4(Ac)2(DMF)2]·4CH3CN (1), and formulated as [Co2Dy2(L)4(Ac)2(DMF)2]·3CH3CN (2) and [Ni2Dy2(L)4(Ac)2(DMF)2]·3CH3CN (3) are prepared and characterized. In comparison to complex 1, the replacement of CoII or NiII with ZnII led to the effective quenching of quantum tunneling of the magnetization (QTM) in complexes 2 and 3. Obviously, the introduction of 3d-4f spin–spin exchange can be important in determining the overall magnetic behaviors of 3d-4f MII2DyIII2} “Butterfly” systems.
为了系统地探究 3d-4f 复合物的磁弛豫机制,两个 "蝴蝶 "MII2DyIII2 复合物与我们之前报道的蝴蝶化合物相关、[Zn2Dy2(L)4(Ac)2(DMF)2]-4CH3CN(1),并配制成[Co2Dy2(L)4(Ac)2(DMF)2]-3CH3CN(2)和[Ni2Dy2(L)4(Ac)2(DMF)2]-3CH3CN(3)。与复合物 1 相比,用 ZnII 取代 CoII 或 NiII 能有效地淬灭复合物 2 和 3 中的磁化量子隧道效应(QTM)。显然,3d-4f 自旋-自旋交换的引入对于决定 3d-4f MII2DyIII2} "蝴蝶 "系统的整体磁性行为非常重要。"蝴蝶 "系统的整体磁性行为。