Three Dy(iii) single-ion magnets bearing the tropolone ligand: structure, magnetic properties and theoretical elucidation
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Updated: Jan 25, 2026
Biofunctionalization of Magnetic Nanomaterials
Published on: July 16, 2020
Zilu Chen1, Shui Yu, Rongdong Wang
1State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China. zlchen@mailbox.gxnu.edu.cn fliangoffice@yahoo.com.
Abstract:
The reactions of dysprosium nitrate with the main ligand of tropolone (HL) in the presence of ancillary ligands of phenanthroline (phen) or 1,3,5-benzenetricarboxylic acid (H3BTC) gave three mononuclear complexes, [Dy(phen)2(L)(NO3)2] (1), [Dy(phen)(L)3]·H2O (2) and [Dy(H3BTC)(H2O)(L)3]2·3H2O (3). They present different sets of mixed ligands. The Dy(iii) ions are ten-coordinated to build a bicapped square anti-prismatic geometry for complex 1 and eight-coordinated in dodecahedral geometries for complexes 2 and 3. Their magnetic properties were investigated in detail. Complexes 1 and 2 are single ion magnets under an external field, and complex 3 is a single ion magnet under zero field. This revealed a tuning effect on the performances of single ion magnets from ancillary ligands. These experimental magnetic behaviours are supported by the results from ab initio calculations, including g-tensors, averaged transition magnetic moments, magnetic easy axes, and crystal field parameters.
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