Alkyl chain length influence of the functionalized diethanolamine ligand on the slow relaxation of the magnetization in {CoIII3DyIII3} complexes - Archive ouverte HAL Access content directly
Journal Articles Dalton Transactions Year : 2024

Alkyl chain length influence of the functionalized diethanolamine ligand on the slow relaxation of the magnetization in {CoIII3DyIII3} complexes

Abstract

We report the synthesis, structural characterization and magnetic properties of a series of Co(III)/Dy(III) complexes built up from an N-alkyl derivatized amino-alcohol ligand diethanolamine, functionalized with C H alkyl chains (n = 3, 4, 6, 8 and 10). While n = 3 afforded a butterfly {CoIIIDyIII} core, the other alkyl n 2n+1 2 2 chains (n = 4, 6, 8) afforded hexanuclear triangle-in-triangle {CoIIIDyIII} complexes as shown by single- 33 crystal X-ray determinations. Infrared spectroscopy allows us to characterize the C10 derivative complex, which did not crystallize. Magnetic ac susceptibility data collected below 10 K at driving frequencies up to 10 kHz under zero-dc field and up to 1 T provide insight into the SMM behaviour of the studied com- plexes. The characteristic time of the magnetization dynamics can be understood in terms of the com- peting Raman, Direct and Orbach-like mechanisms. A relationship between the magnetization dynamics within the family of complexes and the increasing alkyl chain length is discussed.
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hal-04445243 , version 1 (07-02-2024)

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Chloë Bonnenfant, Nahir Vadra, Mathieu Rouzières, Rodolphe Clérac, Fabio D Cukiernik, et al.. Alkyl chain length influence of the functionalized diethanolamine ligand on the slow relaxation of the magnetization in {CoIII3DyIII3} complexes. Dalton Transactions, 2024, 53 (6), pp.2815-2825. ⟨10.1039/d3dt03656a⟩. ⟨hal-04445243⟩
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