Strong Direct Magnetic Coupling in a Dinuclear CoII Tetrazine Radical Single-Molecule Magnet

Woods Toby J.; Ballesteros-Rivas Maria Fernanda; Ostrovsky Sergei M.; Palii Andrew; Reu Oleg; Klokishner Sophia I.; Dunbar Kim

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WOODS, Toby J., BALLESTEROS-RIVAS, Maria Fernanda, OSTROVSKY, Sergei M., PALII, Andrew, REU, Oleg, KLOKISHNER, Sophia I., DUNBAR, Kim. Strong Direct Magnetic Coupling in a Dinuclear CoII Tetrazine Radical Single-Molecule Magnet. In: Chemistry - A European Journal, 2015, vol. 21, pp. 10302-10305. ISSN 0947-6539. DOI: https://doi.org/10.1002/chem.201501726

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Chemistry - A European Journal

Volumul 21 / 2015 / ISSN 0947-6539

Strong Direct Magnetic Coupling in a Dinuclear Co^II Tetrazine Radical Single-Molecule Magnet

DOI:https://doi.org/10.1002/chem.201501726

Pag. 10302-10305

Woods Toby J.¹, Ballesteros-Rivas Maria Fernanda¹, Ostrovsky Sergei M.², Palii Andrew², Reu Oleg², Klokishner Sophia I.², Dunbar Kim¹

¹ Texas A and M University,
² Institute of Applied Physics, Academy of Sciences of Moldova

Disponibil în IBN: 19 iulie 2023

Rezumat

The ligand-centered radical complex [(CoTPMA)₂-μ-bmtz^.-](O₃SCF₃)₃CH₃CN (bmtz=3,6-bis(2′-pyrimidyl)-1,2,4,5-tetrazine, TPMA=tris-(2-pyridylmethyl)amine) has been synthesized from the neutral bmtz precursor. Single-crystal X-ray diffraction studies have confirmed the presence of the ligand-centered radical. The Co^II complex exhibits slow paramagnetic relaxation in an applied DC field with a barrier to spin reversal of 39K. This behavior is a result of strong antiferromagnetic metal-radical coupling combined with positive axial and strong rhombic anisotropic contributions from the Co^II ions.

Cuvinte-cheie
cobalt, dinuclear single molecule magnet, magnetic exchange coupling, Radicals, tetrazine

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<dc:creator>Woods, T.</dc:creator>
<dc:creator>Ballesteros-Rivas, M.</dc:creator>
<dc:creator>Ostrovschii, S.M.</dc:creator>
<dc:creator>Palii, A.V.</dc:creator>
<dc:creator>Reu, O.S.</dc:creator>
<dc:creator>Clochişner, S.I.</dc:creator>
<dc:creator>Dunbar, K.</dc:creator>
<dc:date>2015-07-01</dc:date>
<dc:description xml:lang='en'><p>The ligand-centered radical complex [(CoTPMA)<sub>2</sub>-&mu;-bmtz<sup>.-</sup>](O<sub>3</sub>SCF<sub>3</sub>)<sub>3</sub>CH<sub>3</sub>CN (bmtz=3,6-bis(2&prime;-pyrimidyl)-1,2,4,5-tetrazine, TPMA=tris-(2-pyridylmethyl)amine) has been synthesized from the neutral bmtz precursor. Single-crystal X-ray diffraction studies have confirmed the presence of the ligand-centered radical. The Co<sup>II</sup>&nbsp;complex exhibits slow paramagnetic relaxation in an applied DC field with a barrier to spin reversal of 39K. This behavior is a result of strong antiferromagnetic metal-radical coupling combined with positive axial and strong rhombic anisotropic contributions from the Co<sup>II</sup>&nbsp;ions.</p></dc:description>
<dc:identifier>10.1002/chem.201501726</dc:identifier>
<dc:source>Chemistry - A European Journal  () 10302-10305</dc:source>
<dc:subject>cobalt</dc:subject>
<dc:subject>dinuclear single molecule magnet</dc:subject>
<dc:subject>magnetic exchange coupling</dc:subject>
<dc:subject>Radicals</dc:subject>
<dc:subject>tetrazine</dc:subject>
<dc:title>Strong Direct Magnetic Coupling in a Dinuclear CoII Tetrazine Radical Single-Molecule Magnet</dc:title>
<dc:type>info:eu-repo/semantics/article</dc:type>
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