A propeller-like tetrairon(III) complex functionalized with two 1,2-dithiolan-3-yl groups was synthesized and magnetically characterized. The compound has formula [Fe4(thioctic)2(dpm)6] and was specifically designed to be grafted on gold surfaces. It was prepared by reacting [Fe4(OMe)6(dpm)6] (Hdpm = dipivaloylmethane) with a new tripodal ligand, H3thioctic, obtained by esterification of 2,2-bis(hydroxymethyl)-propane-1,3-diol with (±)-alpha-lipoic acid (also known as thioctic acid). Direct current and alternating current magnetic measurements revealed single-molecule magnet behaviour with an effective anisotropy barrier of 14.0(1) K resulting from a high spin (S = 5) ground state and an easy-axis anisotropy.
A Novel Tripodal Ligand with Organosulfur Alligator Clips for Deposition of Tetrairon(III) Single Molecule Magnets on Gold / RODRIGUEZ DOUTON, Maria Jesus; R., Sessoli; Cornia, Andrea. - In: POLYHEDRON. - ISSN 0277-5387. - STAMPA. - 30:18(2011), pp. 2960-2964. [10.1016/j.poly.2011.01.027]
A Novel Tripodal Ligand with Organosulfur Alligator Clips for Deposition of Tetrairon(III) Single Molecule Magnets on Gold
RODRIGUEZ DOUTON, Maria Jesus;CORNIA, Andrea
2011
Abstract
A propeller-like tetrairon(III) complex functionalized with two 1,2-dithiolan-3-yl groups was synthesized and magnetically characterized. The compound has formula [Fe4(thioctic)2(dpm)6] and was specifically designed to be grafted on gold surfaces. It was prepared by reacting [Fe4(OMe)6(dpm)6] (Hdpm = dipivaloylmethane) with a new tripodal ligand, H3thioctic, obtained by esterification of 2,2-bis(hydroxymethyl)-propane-1,3-diol with (±)-alpha-lipoic acid (also known as thioctic acid). Direct current and alternating current magnetic measurements revealed single-molecule magnet behaviour with an effective anisotropy barrier of 14.0(1) K resulting from a high spin (S = 5) ground state and an easy-axis anisotropy.
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