The tetrairon(III) clusters Fe-4(L)(2) (dpm)(6) where Hdpm = dipivaloylmethane and H3L MeC(CH2OH)(3) or PhC(CH2OH)(3) have been obtained by site-specific replacement of the six methoxide bridges in Fe-4(OMe)(6)(dpm)(6). As compared with the parent compound, the new clusters show a much larger anisotropy in the S = 5 ground spin state (D/k(B) similar to -0.6 K vs. -0.3 K) and a higher energy barrier to the reversal of the magnetization.
Tuneable energy barriers in tetrairon(III) single-molecule magnets / A. Cornia; A. C. Fabretti; P. Garrisi; C. Mortalo; D. Bonacchi; R. Sessoli; L. Sorace; A. L. Barra; W. Wernsdorfer. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - STAMPA. - 272:(2004), pp. E749-E751. [10.1016/j.jmmm.2003.12.1150]
Tuneable energy barriers in tetrairon(III) single-molecule magnets
SESSOLI, ROBERTA;SORACE, LORENZO;
2004
Abstract
The tetrairon(III) clusters Fe-4(L)(2) (dpm)(6) where Hdpm = dipivaloylmethane and H3L MeC(CH2OH)(3) or PhC(CH2OH)(3) have been obtained by site-specific replacement of the six methoxide bridges in Fe-4(OMe)(6)(dpm)(6). As compared with the parent compound, the new clusters show a much larger anisotropy in the S = 5 ground spin state (D/k(B) similar to -0.6 K vs. -0.3 K) and a higher energy barrier to the reversal of the magnetization.
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