Assembly Studies of Two Planar Dy4 Single-Molecule Magnets

Assembly Studies of Two Planar Dy4 Single-Molecule Magnets
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两个平面 Dy4 单分子磁体的组装研究

DOI:
10.1021/acs.cgd.2c01040
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发表时间:
2022-11
期刊:
Crystal Growth & Design
影响因子:
--
通讯作者:
Zilu Chen
Zilu Chen
中科院分区:
其他
文献类型:
--
作者:
Shui Yu;Chuying Chen;Yuzhen Zhang;Yuning Liang;Huan-Cheng Hu;Hua-Hong Zou;Dongcheng Liu;Fupei Liang;Zilu Chen

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通过 DyCl3·6H2O 与相应的 2-羟基-1-萘醛 Schiff 反应合成了两种四核 Dy(III) 配合物 [Dy4(L1)2(L')4(EtOH)2(CH3CN)2(H2O)2]Cl2(1) 和 [Dy4(HL2)2(L')4(MeOH)6]Cl2·3MeOH·2CH3CN (2)水热条件下的碱(H3L1 = 2-甲基-2-((2'-羟基萘-1'-基)亚甲基氨基)丙二醇,HL' = 2-羟基-1-萘醛,H4L2 = 2-(羟甲基)-2-((2'-羟基萘-1'-基)亚甲基氨基)丙二醇)。两种 Dy(III) 配合物具有平面菱形四核骨架,席夫碱配体上具有不同的取代基。磁性研究揭示了两个标题簇的场感应单分子磁体。这表明配位溶剂分子和取代基对单分子磁体性能具有一定的调节作用。通过时间依赖性高分辨率电喷雾电离质谱进一步研究了它们的组装过程,给出了这两个单分子磁体可能的组装机制。
Two tetranuclear Dy(III) complexes formulated as [Dy4(L1)2(L′)4(EtOH)2(CH3CN)2(H2O)2]Cl2(1) and [Dy4(HL2)2(L′)4(MeOH)6]Cl2·3MeOH·2CH3CN (2) were synthesized from the reactions of DyCl3·6H2O with the corresponding 2-hydroxy-1-naphthaldehyde Schiff bases under hydrothermal conditions (H3L1= 2-methyl-2-((2′-hydroxynaphthalen-1′-yl)methyleneamino)propanediol, HL′ = 2-hydroxy-1-naphthaldehyde, and H4L2= 2-(hydroxymethyl)-2-((2′-hydroxynaphthalen-1′-yl)methyleneamino)propanediol). The two Dy(III) complexes possess planar rhombus tetranuclear skeletons with different substitution groups on the Schiff base ligand. The magnetic investigation revealed field-induced single-molecule magnets for the two titled clusters. It suggests that both coordinated solvent molecules and substitution groups have a certain tuning effect on the single-molecule magnet performance. Their assembling processes were further investigated through time-dependent high-resolution electrospray ionization mass spectrometry, giving possible assembling mechanisms for the two titled single-molecule magnets.
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