A study of the magnetic anisotropies of three Ni cubane single-molecule magnets (SMM), [Ni(hmp)(MeOH)Cl]4·H2O (1·H2O) (hmpH = (2-hydroxymethyl)pyridine) [Ni(hmp)(dmb)Cl]4(2) (dmb = 3,3-dimethylbutanol) and [Ni(hmp)(dmp)Cl]4(3) (dmp = 2,2-dimethylpropanol) is reported. Frequency domain magnetic resonance spectroscopic (FDMRS) studies on 1, 2 and 3 as powder pellets reveal zero-field splitting (ZFS) for the spin ground states of these compounds in the solid state. The ZFS of the complexes 1 and 2 were determined and the presence of different molecular species was found in both complexes while only one species was found in 3. The nesting of the variable temperature variable field (VTVH) curves observed from magnetic circular dichroism (MCD) measurements on 1 in solution confirms the presence of ZFS. Virtually all the bands observed in the magnetic circular dichroism spectra possess the same sign, which may be related to the ferromagnetic exchange coupling. In addition, MCD measurements of a dilute solution demonstrate the molecular origin of the magnetic anisotropy in 1. © 2010 Elsevier B.V. All rights reserved

Moro, F., Piga, F., Krivokapic, I., Burgess, A., Lewis, W., Mcmaster, J., et al. (2010). Frequency domain magnetic resonance and magnetic circular dichroism studies on Ni4cubane molecular nanomagnets: A magnetic anisotropy investigation. INORGANICA CHIMICA ACTA, 363(15), 4329-4336 [10.1016/j.ica.2010.08.022].

Frequency domain magnetic resonance and magnetic circular dichroism studies on Ni4cubane molecular nanomagnets: A magnetic anisotropy investigation

Moro, F.;
2010

Abstract

A study of the magnetic anisotropies of three Ni cubane single-molecule magnets (SMM), [Ni(hmp)(MeOH)Cl]4·H2O (1·H2O) (hmpH = (2-hydroxymethyl)pyridine) [Ni(hmp)(dmb)Cl]4(2) (dmb = 3,3-dimethylbutanol) and [Ni(hmp)(dmp)Cl]4(3) (dmp = 2,2-dimethylpropanol) is reported. Frequency domain magnetic resonance spectroscopic (FDMRS) studies on 1, 2 and 3 as powder pellets reveal zero-field splitting (ZFS) for the spin ground states of these compounds in the solid state. The ZFS of the complexes 1 and 2 were determined and the presence of different molecular species was found in both complexes while only one species was found in 3. The nesting of the variable temperature variable field (VTVH) curves observed from magnetic circular dichroism (MCD) measurements on 1 in solution confirms the presence of ZFS. Virtually all the bands observed in the magnetic circular dichroism spectra possess the same sign, which may be related to the ferromagnetic exchange coupling. In addition, MCD measurements of a dilute solution demonstrate the molecular origin of the magnetic anisotropy in 1. © 2010 Elsevier B.V. All rights reserved
Articolo in rivista - Articolo scientifico
Ferromagnetic coupled Ni cubanes; Magnetic circular dichroism; Magnetic resonance spectroscopy; Molecular nanomagnets; SQUID; Zero-field splitting;
English
2010
363
15
4329
4336
none
Moro, F., Piga, F., Krivokapic, I., Burgess, A., Lewis, W., Mcmaster, J., et al. (2010). Frequency domain magnetic resonance and magnetic circular dichroism studies on Ni4cubane molecular nanomagnets: A magnetic anisotropy investigation. INORGANICA CHIMICA ACTA, 363(15), 4329-4336 [10.1016/j.ica.2010.08.022].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/210661
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