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Field-induced mononuclear cobalt(II) single-molecule magnet (SMM) based on a benzothiadiazole-ortho-vanillin ligand †

Abstract : A unique -conjugated benzothiadiazole-ortho-vanillin ligand (HL), characterized by single crystal X-ray diffraction and DFT calculations, has been prepared by condensation between 4-amino-benzothiadiazole (BTD) and ortho-vanillin. Its reaction with cobalt(II) acetate afforded the complex of formula [CoL2]•CH2Cl2 (1), for which the coordination environment of the cobalt centre is a distorted octahedron and the ligand acts as a monoanionic tridentate NNO chelate in its phenolate form. Intermolecular - stacking interactions between the -conjugated BTD units provides an antiferromagnetic coupling pathway, as indicated by the analysis of the dc magnetic measurements of a crystalline sample of complex and supported by DFT type calculations. The static magnetic behaviour of 1 is analysed according to spinorbit coupling and zero-field splitting models. Remarkably, the complex exhibits slow relaxation of the magnetization under applied magnetic field being thus a new example of fieldinduced mononuclear single-molecule magnet (SMM).
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https://hal.univ-angers.fr/hal-03855033
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Soumis le : mercredi 16 novembre 2022 - 10:41:52
Dernière modification le : jeudi 17 novembre 2022 - 04:12:46

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Nataliya Plyuta, Svitlana Petrusenko, Vladimir N Kokozay, Thomas Cauchy, Francesc Lloret, et al.. Field-induced mononuclear cobalt(II) single-molecule magnet (SMM) based on a benzothiadiazole-ortho-vanillin ligand †. Dalton Transactions, 2022, 51 (12), pp.4760-4771. ⟨10.1039/D1DT04274B⟩. ⟨hal-03855033⟩

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