Issue 24, 2011

A diabolo-shaped Dy9 cluster: synthesis, crystal structure and magnetic properties

Abstract

The reaction of Dy(NO3)3·6H2O with the ligand 2-((1-hydroxybutan-2-ylimino)methyl)phenol (H2L, Scheme 1) generates the nonanuclear compound [Dy9L83-OH)84-OH)2(CH3OH)8](OH)(CH3OH)3 (Dy9), whose single-crystal X-ray structure reveals the presence of two square pyramidal pentanuclear units assembled via the apical metal center. The square pyramidal core of a previously reported [Dy54-OH)(μ3-OH)4(μ-η2-Ph2acac)42-Ph2acac)6] (Dy5; Ph2acac = dibenzoylmethanide), is structurally related to those herein described; however, the magnetic properties of Dy9 and Dy5 are drastically different. Indeed, Dy5 shows slow relaxation of magnetization while no out-of-phase ac signal is noticed for Dy9. The underlying mechanism is not clear due to the complexity of such systems; however, the different anisotropy of the respective structures, which is dictated by the combination of the metal topology, the ligands involved and the structural parameters of the molecule, is mostly responsible for the distinctive relaxation dynamics observed.

Graphical abstract: A diabolo-shaped Dy9 cluster: synthesis, crystal structure and magnetic properties

Supplementary files

Article information

Article type
Paper
Submitted
17 Mar 2011
Accepted
07 Apr 2011
First published
12 May 2011

Dalton Trans., 2011,40, 6440-6444

A diabolo-shaped Dy9 cluster: synthesis, crystal structure and magnetic properties

X. Xu, L. Zhao, G. Xu, Y. Guo, J. Tang and Z. Liu, Dalton Trans., 2011, 40, 6440 DOI: 10.1039/C1DT10450K

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