Jin, C., Li, X., Liu, Z., Mansikkamäki, A., Tang, J. (2020) An investigation into the magnetic interactions in a series of Dy2 single-molecule magnets. Dalton Trans., 2020,49, 10477-10485. https://doi.org/10.1039/D0DT01926G
An investigation into the magnetic interactions in a series of Dy₂ single-molecule magnets
|Author:||Jin, Chaoyi1,2; Li, Xiao-Lei1; Liu, Zhiliang2;|
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
2College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China
3NMR Research Unit, University of Oulu, P.O. Box 8000, Finland
4School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, P. R. China
|Online Access:||PDF Full Text (PDF, 2.3 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020082161335
Royal Society of Chemistry,
|Publish Date:|| 2020-08-21
Three di-nuclear DyIII complexes [Dy₂(H₂L)₂(tfa)]·Cl·3DMF (1), [Dy₂(H₂L)₂(MeO)(SCN)]·MeOH (2) and [Dy₂(H₂L)₂(MeOH)Cl]·Cl·2MeOH (3) were synthesized and structurally and magnetically characterized. The Dy1/Dy2 centers in these complexes are all nine-coordinate with spherical capped square antiprism (local C₄v symmetry) environments. All complexes display single-molecule magnet (SMM) behavior under zero applied dc field with their properties dependent on the nature of the magnetic interactions between the DyIII ions. Ab initio calculations substantiate that all DyIII ions show a weakly axial crystal-field environment with the exception of one of the DyIII ions in complex 2. The ground Kramers doublets show modest amounts of quantum tunneling of magnetization that gets blocked by the interaction between the DyIII ions, leading to a thermally activated slow relaxation of magnetization. The interaction between the ions is ferromagnetic and mostly originates from the dipolar interaction. However, anti-ferromagnetic intermolecular interaction plays an important role and in the case of complex 2 it is sufficiently strong to mask the ferromagnetic intramolecular interaction.
|Pages:||10477 - 10485|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
114 Physical sciences
116 Chemical sciences
We thank the National Natural Science Foundation of China (Grants 21525103 and 21871247) and Key Research Program of Frontier Sciences, CAS (Grant ZDBS-LY-SLH023) for financial support. J. T. gratefully acknowledges support of the Royal Society-Newton Advanced Fellowship (NA160075). A. M. acknowledges funding provided by the Magnus Ehrnrooth Foundation and Kvantum Institute (University of Oulu).
© 2020 The Authors. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.