resumo
The influence of the solvent in the reaction of dysprosium(III) chloride hydrate with the N3O2 ligand H2L (2,6-bis(2-hydroxyphenyliminomethyl)pyridine) was studied To this end, the new mononuclear chloride complex [Dy(L)Cl(H2O)(2)] (1) was isolated in absolute ethanol as solvent, without any evidence of the hydrolysis of the ligand. This clearly contrasts with previous results, where a similar reaction in methanol proceeds with the partial hydrolysis of the Schiff base, and the formation of a new hemiacetal donor to yield [Dy(HL')(2))][Dy(L)(Cl-2)] (H2L' = (6-(2-hydroxyphenyliminomethyl)-2-methoxyhydroxymethyl)pyridine). The single crystal X-ray structure of the chloride complex 1 shows that the Dy-III ion is octacoordinated in a highly distorted N3O4Cl environment between triangular dodecahedral and biaugmented trigonal prisms. The full magnetic characterisation of 1 shows that it presents field-induced single ion magnet behaviour, with a thermal energy barrier U-eff of 113.5 K, which is the highest among dysprosium complexes derived from H2L.
palavras-chave
LN(III) COMPLEXES; SLOW RELAXATION; MAGNETIZATION
categoria
Chemistry; Materials Science
autores
Corredoira-Vázquez, J; Oreiro-Martínez, P; García-Deibe, AM; Sanmartín-Matalobos, J; Fondo, M
nossos autores
Julio Corredoira Vázquez
Bolseiro de pós-Doutoramentoagradecimentos
This research received no external funding. J.C.V. thanks Xunta de Galicia for his postdoctoral fellowship (ED481B-2022-068). P.O.M. thanks the Fundacion Segundo Gil Davila for her PhD fellowship.