Photo-mediated performance change of a 1,8-dihydroxyanthraquinone-based Dy6 single molecule magnet

IF 6.4 1区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Frontiers Pub Date : 2025-08-26 DOI:10.1039/d5qi01613d

lan liu, Huan-Cheng Hu, Kai Wang, Zhan-Yun zhang, Shui Yu, Dongcheng Liu, Zhao-Bo Hu, Fupei Liang, Zilu Chen

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Abstract

In photomagnetic materials, the changes of molecular structure or electron distribution caused by illumination may result in the changes of magnetism, so as to regulate the magnetic behavior of materials. Herein we report a 1,8-dihydroxyanthraquinone-based hexanuclear dysprosium cluster [Dy₆O₂(L¹)₆(OCH₃)₂(CH₃OH)₂(DMSO)₄]·DMSO·CH₃OH (1) obtained from the solvothermal reactions of Dy(OAc)₃·5H₂O with 1,8-dihydroxyanthraquinone (H₂L¹). The six Dy(III) ions in 1 are linked by two μ₄-O, two μ₃-O and ten μ₂-O atoms to construct a rare bicapped tetrahedron Dy₆ skeleton. Magnetic tests showed that the cluster is a single molecule magnet (SMM) under zero field. Upon light irradiation, the terminally coordinated CH₃OH molecules in 1 were partly substituted by lattice DMSO molecules with the SMM performance significantly tuned by this subtle structural variation. Single molecule magnets with such photomagnetic behavior are rarely reported.

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1,8-二羟基蒽醌基Dy6单分子磁体光介导的性能变化

在光磁性材料中，光照引起的分子结构或电子分布的变化可能导致磁性的变化，从而调节材料的磁性行为。本文报道了由Dy(OAc)3·5H2O与1,8-二羟基蒽醌（H2L1）溶剂热反应得到的1,8-二羟基蒽醌基六核镝团簇[Dy6O2(L1)6(OCH3)2(CH3OH)2(DMSO)4]·DMSO·CH3OH(1)。1中的6个Dy（III）离子由2个μ4-O、2个μ3-O和10个μ2-O原子连接，形成罕见的双头四面体Dy6骨架。磁性测试表明，该簇在零场下为单分子磁体。在光照射下，1中末端配位的CH3OH分子部分被点状DMSO分子取代，这种细微的结构变化显著地调整了SMM性能。具有这种光磁性行为的单分子磁体很少被报道。

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