Single-molecule magnet behaviour in a tetranuclear DyIII complex formed from a novel tetrazine-centered hydrazone Schiff base ligand

T. Lacelle; G. Brunet; A. Pialat; R. J. Holmberg; Y. Lan; B. Gabidullin; I. Korobkov; W. Wernsdorfer; M. Murugesu

doi:10.1039/C6DT04413A

Single-molecule magnet behaviour in a tetranuclear Dy^III complex formed from a novel tetrazine-centered hydrazone Schiff base ligand†

T. Lacelle,^a G. Brunet,

^a A. Pialat,^a R. J. Holmberg,^a Y. Lan,^b B. Gabidullin,^a I. Korobkov,^a W. Wernsdorfer^bcd and M. Murugesu

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada
E-mail: m.murugesu@uottawa.ca

^b Institut Néel, CNRS and Université Grenoble Alpes, BP 166, 25 Avenue des Martyrs, 38042 Grenoble, France

^c Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede Str. 1, Karlsruhe, Germany

^d Institut für Nanotechnologie, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen, Germany

Abstract

Two analogous tetranuclear lanthanide complexes have been synthesized with the general formula [Ln₄(vht)₄(MeOH)₈](NO₃)₄·aMeOH·bH₂O, where H₂vht = (3,6-bis(vanillidenehydrazinyl)-1,2,4,5-tetrazine) and Ln = Dy^III (1), Gd^III (2). These complexes are characterized by several techniques; including single-crystal X-ray diffraction, SQUID magnetometry and single-crystal micro-SQUID hysteresis loop measurements. Elucidation of the crystal structure of the complexes shows that the lanthanide ions are bridged by a tetrazine ring, a rare bridging moiety for lanthanide ions. Magnetic studies reveal that both 1 and 2 exhibit weak ferromagnetic exchange interactions between Ln ions, and 1 displaying Single-Molecule Magnet (SMM) behaviour with a magnetisation reversal barrier of U_eff = 158 K (τ₀ = 1.06 × 10⁻⁷ s).

This article is part of the themed collection: CSC100: Celebrating Canadian Chemistry

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Article information

DOI: https://doi.org/10.1039/C6DT04413A
Article type: Paper
Submitted: 21 Nov 2016
Accepted: 14 Jan 2017
First published: 03 Feb 2017

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Dalton Trans., 2017,46, 2471-2478

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Single-molecule magnet behaviour in a tetranuclear Dy^III complex formed from a novel tetrazine-centered hydrazone Schiff base ligand

T. Lacelle, G. Brunet, A. Pialat, R. J. Holmberg, Y. Lan, B. Gabidullin, I. Korobkov, W. Wernsdorfer and M. Murugesu, Dalton Trans., 2017, 46, 2471 DOI: 10.1039/C6DT04413A

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