Single-molecule magnet behaviour in a tetranuclear DyIIIcomplex formed from a novel tetrazine-centered hydrazone Schiff base ligand.
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 = DyIII(1), GdIII(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 Ueff= 158 K (τ0= 1.06 × 10-7s).
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada. m.murugesu@uottawa.ca.
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Lacelle
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada. m.murugesu@uottawa.ca.
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http://orcid.org/0000-0001-9846-7845
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Brunet
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada. m.murugesu@uottawa.ca.
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Pialat
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada. m.murugesu@uottawa.ca.
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Holmberg
Institut Néel, CNRS and Université Grenoble Alpes, BP 166, 25 Avenue des Martyrs, 38042 Grenoble, France.
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Lan
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada. m.murugesu@uottawa.ca.
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Gabidullin
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada. m.murugesu@uottawa.ca.
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Korobkov
Institut Néel, CNRS and Université Grenoble Alpes, BP 166, 25 Avenue des Martyrs, 38042 Grenoble, France and Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede Str. 1, D-76131, Karlsruhe, Germany and Institut für Nanotechnologie, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany.
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Wernsdorfer
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, ON K1N 6N5, Canada. m.murugesu@uottawa.ca.
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http://orcid.org/0000-0002-5123-374X
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Murugesu