Issue 17, 2019

Dramatic impact of auxiliary ligands on the two-step magnetic relaxation process in Dy4(iii) single-molecule magnets

Abstract

To better understand the factors determining the multi-step relaxation processes in polynuclear lanthanide single molecule magnets (SMMs), two Dy(III)4 SMMs showing two-step relaxation processes were elaborately designed and investigated for their structure-dependent magnetic properties. Through targetedly fine-tuning the auxiliary ligand (from the anion of 1-phenylbutane-1,3-dione to 2-acetylcyclopentanone) on specific Dy(III) sites while retaining the same type of coordination atoms, one of the two relaxation processes shifted to higher temperature with an increase of energy barrier, which permits the unambiguous assignment of the relaxation processes to specific metal sites. Therefore, the present {Dy4} systems provide a good example to probe the factors determining the relaxation dynamics, and point to a simple way to optimize the magnetic performance of polynuclear dysprosium SMMs.

Graphical abstract: Dramatic impact of auxiliary ligands on the two-step magnetic relaxation process in Dy4(iii) single-molecule magnets

Supplementary files

Article information

Article type
Paper
Submitted
12 Mar 2019
Accepted
04 Apr 2019
First published
05 Apr 2019

Dalton Trans., 2019,48, 5793-5799

Dramatic impact of auxiliary ligands on the two-step magnetic relaxation process in Dy4(III) single-molecule magnets

K. Zhang, G. Li, C. Zhang and Y. Wang, Dalton Trans., 2019, 48, 5793 DOI: 10.1039/C9DT01076A

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