Chelating Guanidinates for Dysprosium(III) Single‐Molecule Magnets

Main observation and conclusion Two chelating guanidinate‐based dysprosium(III) complexes, namely the monomeric {(Me3Si)2NC(NiPr)2}2Dy(μ‐Cl)2Li(THF)2 1 and the dimeric [{(Me3Si)2NC(NiPr)2}2Dy(μ‐Cl)]2 2, have been confirmed to be single‐molecule magnets. Moreover, the alteration from 1 to 2 leads to...

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Bibliographic Details
Published in:Chinese journal of chemistry 2021-06, Vol.39 (6), p.1635-1640
Main Authors: Jin, Peng‐Bo, Yu, Ke‐Xin, Zhai, Yuan‐Qi, Luo, Qian‐Cheng, Wang, Yi‐Dian, Zhang, Xu‐Feng, Lv, Yi, Zheng, Yan‐Zhen
Format: Article
Language:English
Subjects:
Ab initio calculations
Chelation
Dilution
Dysprosium
Guanidinate ligand
Hysteresis
Hysteresis loops
Lanthanides
Magnetic induction
Magnetic properties
Magnetic relaxation
Magnets
Quantum tunnelling
Single‐molecule magnets
Yttrium
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Summary:Main observation and conclusion Two chelating guanidinate‐based dysprosium(III) complexes, namely the monomeric {(Me3Si)2NC(NiPr)2}2Dy(μ‐Cl)2Li(THF)2 1 and the dimeric [{(Me3Si)2NC(NiPr)2}2Dy(μ‐Cl)]2 2, have been confirmed to be single‐molecule magnets. Moreover, the alteration from 1 to 2 leads to an obvious mitigated quantum tunnelling of magnetization at zero field of the hysteresis loop and much enhanced magnetic relaxation barrier (up to 312 K). 5% dilution with the yttrium(III) analogue for 2 shows no clear change for the hysteresis, indicating the single‐ion nature of the magnetic behavior. Two guanidinate‐based Dy(III) complexes have been confirmed to be single‐molecule magnets with great potential.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.202100041