Single-Molecule Magnet Properties in 3Id/I4If/I Heterobimetallic Iron and Dysprosium Complexes Involving Hydrazone Ligand

The reaction between the ((E)-N′-(2-hydroxy-3-methoxybenzylidene)pyrazine-2-carbohydrazide) (H[sub.2]opch) ligand and the metallo-precursor [Dy(hfac)[sub.3]]·2H[sub.2]O led to the formation of an homometallic coordination complex with the formula [Dy[sub.2](hfac)[sub.3](H[sub.2]O)(Hopch)[sub.2]][Dy(...

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Veröffentlicht in:Molecules (Basel, Switzerland) Switzerland), 2023-08, Vol.28 (17)
Hauptverfasser: Lefeuvre, Bertrand, Guizouarn, Thierry, Dorcet, Vincent, Cordier, Marie, Pointillart, Fabrice
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Sprache:eng
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Zusammenfassung:The reaction between the ((E)-N′-(2-hydroxy-3-methoxybenzylidene)pyrazine-2-carbohydrazide) (H[sub.2]opch) ligand and the metallo-precursor [Dy(hfac)[sub.3]]·2H[sub.2]O led to the formation of an homometallic coordination complex with the formula [Dy[sub.2](hfac)[sub.3](H[sub.2]O)(Hopch)[sub.2]][Dy(hfac)[sub.4]] (1). In presence of both [Dy(hfac)[sub.3]] 2H[sub.2]O and the Fe(II) salt, the heterobimetallic tetranuclear [FeDy[sub.3](hfac)[sub.8](H[sub.2]O)[sub.2](opch)[sub.2]] (2) was isolated, while the addition of the co-ligand 1,2-Bis(2-hydroxy-3-methoxybenzylidene) hydrazine (H[sub.2]bmh) led to the formation of two heterobimetallic tetranuclear complexes with the formula [Fe[sub.3]Dy(hfac)[sub.6](opch)[sub.2](H[sub.2]bmh)] C[sub.6]H[sub.14] (3) C6H14 and [Fe[sub.2]Dy[sub.2](hfac)[sub.7](opch)[sub.2](H[sub.2]bmh)] 0.5C[sub.7]H[sub.16] (4) 0.5C7H16. Single crystal X-ray diffraction and dc magnetic investigation demonstrated that 3 and 4 involved the iron center in the +II and +III oxidation states. Dynamic magnetic measurements highlighted the single-molecule magnet behavior of 1 and 2 in a zero applied dc field primarily due to the ferromagnetic interactions taking place in these compounds.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules28176359