“Alligator clips” suitable for grafting on H-terminated siliconor gold surfaces have been incorporated into single-moleculemagnets (SMMs) of the Fe4 family. Tripodal ligands 2,2-bis-(hydroxymethyl)-10-undecen-1-ol (H3L1) and 11-(acetylthio)-2,2-bis(hydroxymethyl)undecan-1-ol (H3L2) have been usedto replace the six methoxide bridges in [Fe4(OMe)6(dpm)6],affording new Fe4 derivatives [Fe4(L1)2(dpm)6] (1) and[Fe4(L2)2(dpm)6] (2) in high yield (Hdpm = dipivaloylmethane).The molecular structures have been unambiguously established by XRD combined with ESI-MS and magnetic characterization techniques, including DC and AC magnetometry and high-frequency EPR spectroscopy. The twoSMMs have an S = 5 ground state and an easy-axis magneticanisotropy leading to slow relaxation of the magnetization atlow temperature, with effective anisotropy barriers of15.9(2) K in 1 and 15.1(2) K in 2.

New Single-Molecule Magnets by Site-Specific Substitution: Incorporation of “Alligator Clips” into Fe4 Complexes / A. L., Barra; F., Bianchi; A., Caneschi; Cornia, Andrea; D., Gatteschi; L., Gorini; Gregoli, Luisa; M., Maffini; Parenti, Francesca; R., Sessoli; L., Sorace; Talarico, Anna Maria. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - STAMPA. - "/":26(2007), pp. 4145-4152. [10.1002/ejic.200700382]

New Single-Molecule Magnets by Site-Specific Substitution: Incorporation of “Alligator Clips” into Fe4 Complexes

CORNIA, Andrea;GREGOLI, Luisa;PARENTI, Francesca;TALARICO, Anna Maria
2007

Abstract

“Alligator clips” suitable for grafting on H-terminated siliconor gold surfaces have been incorporated into single-moleculemagnets (SMMs) of the Fe4 family. Tripodal ligands 2,2-bis-(hydroxymethyl)-10-undecen-1-ol (H3L1) and 11-(acetylthio)-2,2-bis(hydroxymethyl)undecan-1-ol (H3L2) have been usedto replace the six methoxide bridges in [Fe4(OMe)6(dpm)6],affording new Fe4 derivatives [Fe4(L1)2(dpm)6] (1) and[Fe4(L2)2(dpm)6] (2) in high yield (Hdpm = dipivaloylmethane).The molecular structures have been unambiguously established by XRD combined with ESI-MS and magnetic characterization techniques, including DC and AC magnetometry and high-frequency EPR spectroscopy. The twoSMMs have an S = 5 ground state and an easy-axis magneticanisotropy leading to slow relaxation of the magnetization atlow temperature, with effective anisotropy barriers of15.9(2) K in 1 and 15.1(2) K in 2.
2007
"/"
26
4145
4152
New Single-Molecule Magnets by Site-Specific Substitution: Incorporation of “Alligator Clips” into Fe4 Complexes / A. L., Barra; F., Bianchi; A., Caneschi; Cornia, Andrea; D., Gatteschi; L., Gorini; Gregoli, Luisa; M., Maffini; Parenti, Francesca; R., Sessoli; L., Sorace; Talarico, Anna Maria. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - STAMPA. - "/":26(2007), pp. 4145-4152. [10.1002/ejic.200700382]
A. L., Barra; F., Bianchi; A., Caneschi; Cornia, Andrea; D., Gatteschi; L., Gorini; Gregoli, Luisa; M., Maffini; Parenti, Francesca; R., Sessoli; L., ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/585389
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