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Syntheses, structural modulation, and slow magnetic relaxation of three dysprosium(III) complexes with mononuclear, dinuclear, and one-dimensional structures
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-08-31 , DOI: 10.1039/d1dt02532e Hua-Jian Ye 1 , Tian Zhang 1 , Shu-Yuan Huang 1 , Xiao-Ling Liu 1 , Wen-Bin Chen 1 , Yi-Quan Zhang 2 , Jinkui Tang 3 , Wen Dong 1
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-08-31 , DOI: 10.1039/d1dt02532e Hua-Jian Ye 1 , Tian Zhang 1 , Shu-Yuan Huang 1 , Xiao-Ling Liu 1 , Wen-Bin Chen 1 , Yi-Quan Zhang 2 , Jinkui Tang 3 , Wen Dong 1
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Three mononuclear, dinuclear and one-dimensional dysprosium(III) complexes based on 3-azotriazolyl-2,6-dihydroxybenzoic acid (H4ATB) of [Dy(H3ATB)3]·3H2O (1), [Dy2(H2ATB)2(H2DHB)2(H2O)4]·2CH3CN·5H2O (2), and [Dy2(H2ATB)2(DCB)(DMF)2(H2O)2]·4DMF (3) were synthesized and structurally characterized by X-ray single crystal diffraction (H3DHB = 2,6-dihydroxybenzoic acid, H2DCB = 1,4-dicarboxybenzene). Complex 1 was used as a precursor to synthesize complexes 2 and 3, and 2 was further used to synthesize 3. Complex 1 is a mononuclear complex, in which the Dy(III) ion is in a nine-coordinated structure surrounded by three tridentate chelate H3ATB− ligands. Complex 2 displays a dinuclear structure bridged by two μ2 carboxyl groups of two H2DHB− ligands and two μ1,1-O atoms from the phenolic hydroxyl groups of two H2ATB2− ligands. Complex 3 shows a one-dimensional structure formed by two bridging DCB2− ligands. The magnetic measurements were performed on three complexes 1–3, and they showed different magnetic behavior. Complex 1 shows a field-induced slow magnetic relaxation. Complexes 2 and 3 display distinct slow magnetic relaxation under zero dc field with energy barriers (Ueff) of 26(2) cm−1 and 11(1) cm−1, respectively. The magnetic behavior of three complexes 1–3 was investigated by ab initio calculations.
中文翻译：
具有单核、双核和一维结构的三种镝 (III) 配合物的合成、结构调制和慢磁弛豫
三个单核，双核和一维镝（III）配合物基于3- azotriazolyl-2,6-二羟基苯甲酸（H 4 ATB）的[镝（H 3 ATB）3 ]·3H 2 O（1），[镝2 (H 2 ATB) 2 (H 2 DHB) 2 (H 2 O) 4 ]·2CH 3 CN·5H 2 O ( 2 )和[Dy 2 (H 2 ATB) 2 (DCB)(DMF) 2 ( H 2 O) 2 ]·4DMF ( 3) 合成并通过 X 射线单晶衍射进行结构表征（H 3 DHB = 2,6-二羟基苯甲酸，H 2 DCB = 1,4-二羧基苯）。复杂1被用作前体以合成复合物2和3，和2进一步用于合成3。配合物1是单核配合物，其中 Dy( III ) 离子呈九配位结构，被三个三齿螯合 H 3 ATB -配体包围。配合物2显示由两个 H 2 的两个 μ 2羧基桥接的双核结构DHB -配体和来自两个 H 2 ATB 2-配体的酚羟基的两个 μ 1,1 -O 原子。复合物3显示由两个桥接 DCB 2-配体形成的一维结构。对三个复合物1-3进行了磁性测量，它们显示出不同的磁性行为。复合物1显示了场诱导的缓慢磁弛豫。配合物2和3在零直流场下表现出明显的慢磁弛豫，能垒 ( U eff ) 为 26(2) cm -1和 11(1) cm -1， 分别。通过从头计算研究了三种配合物1-3的磁性行为。
更新日期：2021-09-14
中文翻译：
具有单核、双核和一维结构的三种镝 (III) 配合物的合成、结构调制和慢磁弛豫
三个单核，双核和一维镝（III）配合物基于3- azotriazolyl-2,6-二羟基苯甲酸（H 4 ATB）的[镝（H 3 ATB）3 ]·3H 2 O（1），[镝2 (H 2 ATB) 2 (H 2 DHB) 2 (H 2 O) 4 ]·2CH 3 CN·5H 2 O ( 2 )和[Dy 2 (H 2 ATB) 2 (DCB)(DMF) 2 ( H 2 O) 2 ]·4DMF ( 3) 合成并通过 X 射线单晶衍射进行结构表征（H 3 DHB = 2,6-二羟基苯甲酸，H 2 DCB = 1,4-二羧基苯）。复杂1被用作前体以合成复合物2和3，和2进一步用于合成3。配合物1是单核配合物，其中 Dy( III ) 离子呈九配位结构，被三个三齿螯合 H 3 ATB -配体包围。配合物2显示由两个 H 2 的两个 μ 2羧基桥接的双核结构DHB -配体和来自两个 H 2 ATB 2-配体的酚羟基的两个 μ 1,1 -O 原子。复合物3显示由两个桥接 DCB 2-配体形成的一维结构。对三个复合物1-3进行了磁性测量，它们显示出不同的磁性行为。复合物1显示了场诱导的缓慢磁弛豫。配合物2和3在零直流场下表现出明显的慢磁弛豫，能垒 ( U eff ) 为 26(2) cm -1和 11(1) cm -1， 分别。通过从头计算研究了三种配合物1-3的磁性行为。
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