Sensitive magnetic-field-response magnetization dynamics in a one-dimensional dysprosium coordination polymer

One-dimensional (1D) magnetic materials are intriguing due to their low densities and structural and chemical versatility. Herein a Dy(iii) coordination polymer with significant single-molecule magnet behavior has been constructed with a strongly magnetic anisotropic Dy(iii) motif and a luminescence...

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Bibliographic Details
Published in:Inorganic chemistry frontiers 2021-10, Vol.8 (21), p.4657-4665
Main Authors: Yun-Xia Qu, Ze-Yu Ruan, Guo-Zhang, Huang, Yan-Cong, Chen, Liu, Yang, Jian-Hua, Jia, Jun-Liang, Liu, Ming-Liang, Tong
Format: Article
Language:English
Subjects:
Coordination polymers
Diamagnetism
Dipole interactions
Dysprosium
Energy levels
Hexanes
Hysteresis loops
Inorganic chemistry
Magnetic dipoles
Magnetic fields
Magnetic induction
Magnetic materials
Magnetic relaxation
Magnetism
Magnetization
Photoluminescence
Polymers
Relaxation time
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Summary:One-dimensional (1D) magnetic materials are intriguing due to their low densities and structural and chemical versatility. Herein a Dy(iii) coordination polymer with significant single-molecule magnet behavior has been constructed with a strongly magnetic anisotropic Dy(iii) motif and a luminescence-active bis(diphenylphosphinyl)hexane ligand. An energy barrier of 626 K and butterfly-like hysteresis loops below 9 K are unprecedented for lanthanide coordination polymers. Moreover, the frequency-dependent out-of-phase alternating-current susceptibility shows clear field dependence of the double-relaxation-time pattern, which exhibits an “isosbestic point” over the increasing applied magnetic field; however, it disappears in the sample diluted with diamagnetic Y(iii), which strongly indicates that the magnetic dipole interaction is responsible for the presence of the “isosbestic point”. The photoluminescence spectra provide crucial information on the energy level that is consistent with the energy barrier and show semi-quantitative agreement with the result of ab initio calculations. The construction of this Dy(iii) polymer provides a good example to explore the sensitive magnetic-field-response magnetization dynamics involving magnetic dipole interaction, by overcoming which the magnetic relaxation time can be tuned via an external magnetic field.
ISSN:2052-1545
2052-1553
DOI:10.1039/d1qi00873k