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Issue 33, 2010
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Synthesis, characterisation and computational studies on a novel one-dimensional arrangement of Schiff-base Mn3 single-molecule magnet

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Abstract

The syntheses, structures and magnetic properties are reported for three new manganese complexes containing the Schiff-base ((2-hydroxy-3-methoxyphenyl)methylene)isonicotinohydrazine (H2hmi) ligand. Complex [MnII(H2hmi)2(MeOH)2Cl2] (1) was obtained from the reaction of H2hmi with MnCl2 in a MeOHMeCN mixture. Addition of triethylamine to the previous reaction mixture followed by diethyl ether diffusion yielded a dinuclear manganese [MnIII2(hmi)2(OMe)2]·2MeCN·2OEt2 (2) compound. Upon increasing the MnCl2/H2hmi ratio, the mixed valence complex [MnIII2MnII(hmi)2(OMe)2Cl2]·MeOH (3) was obtained. Dc and ac magnetic measurements were carried out on all three samples. The ac susceptibility and field dependence of the magnetisation measurements confirmed that complex 3 exhibits a single-molecule magnet behaviour with an effective energy barrier of 8.1 K and an Arrhenius pre-exponential factor of 3 × 10−9 s.

Graphical abstract: Synthesis, characterisation and computational studies on a novel one-dimensional arrangement of Schiff-base Mn3 single-molecule magnet

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Publication details

The article was received on 15 Mar 2010, accepted on 13 May 2010 and first published on 13 Jul 2010


Article type: Paper
DOI: 10.1039/C0DT00143K
Citation: Dalton Trans., 2010,39, 7650-7658
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    Synthesis, characterisation and computational studies on a novel one-dimensional arrangement of Schiff-base Mn3 single-molecule magnet

    P. Lin, S. Gorelsky, D. Savard, T. J. Burchell, W. Wernsdorfer, R. Clérac and M. Murugesu, Dalton Trans., 2010, 39, 7650
    DOI: 10.1039/C0DT00143K

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