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Abstract:

In this work we review the Co 2 III Ln 2 III family of compounds reported up to date that shows SMM features. The vast majority of them show a butterfly arrangement with Ln III ions placed at the body positions. The number of Dy III examples constitutes the majority, probably because of the intrinsic properties of this lanthanide ion regarding SMMs characteristics. Butterfly complexes have a SAP geometry around Ln III ions with a variety of distortion degrees. However, when looking at the key U eff parameter trend through this family of complexes, it becomes clear that a pure geometrical consideration is not enough to explain it. Ab initio based calculations provide evidence of highly anisotropic m J ground states for complexes where Ln III = Dy III , pointing to exclusively m J = 15/2 ground Kramers doublets. These calculations also agree with the thermally activated relaxation involving the first excited state and, in some examples where multiple relaxation pathways are observed, higher excited states. A few examples prove that Raman and/or direct mechanisms cannot be discarded a priori. Only two examples of isostructural Ln III families of the same Co 2 III Ln 2 III complex can be found. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Registro:

Documento: Artículo
Título:Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets
Autor:Funes, A.V.; Alborés, P.
Filiación:Departamento de Química Inorgánica, Analítica y Química Física/ INQUIMAE (CONICET), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina
Palabras clave:Cobalt; Lanthanides; Magnetic properties; Single-molecule magnets; Slow relaxation
Año:2018
Volumen:2018
Número:20
Página de inicio:2067
Página de fin:2089
DOI: http://dx.doi.org/10.1002/ejic.201800253
Título revista:European Journal of Inorganic Chemistry
Título revista abreviado:Eur. J. Inorg. Chem.
ISSN:14341948
CODEN:EJICF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14341948_v2018_n20_p2067_Funes

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Citas:

---------- APA ----------
Funes, A.V. & Alborés, P. (2018) . Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets. European Journal of Inorganic Chemistry, 2018(20), 2067-2089.
http://dx.doi.org/10.1002/ejic.201800253
---------- CHICAGO ----------
Funes, A.V., Alborés, P. "Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets" . European Journal of Inorganic Chemistry 2018, no. 20 (2018) : 2067-2089.
http://dx.doi.org/10.1002/ejic.201800253
---------- MLA ----------
Funes, A.V., Alborés, P. "Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets" . European Journal of Inorganic Chemistry, vol. 2018, no. 20, 2018, pp. 2067-2089.
http://dx.doi.org/10.1002/ejic.201800253
---------- VANCOUVER ----------
Funes, A.V., Alborés, P. Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets. Eur. J. Inorg. Chem. 2018;2018(20):2067-2089.
http://dx.doi.org/10.1002/ejic.201800253