Tuning magnetic properties using targeted structural distortion: New additions to a family of Mn6 single-molecule magnets |
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| Authors: | Leigh F Jones Martyn E Cochrane Bryan D Koivisto David A Leigh Spyros P Perlepes Wolfgang Wernsdorfer Euan K Brechin |
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| Institution: | 1. School of Chemistry, The University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, UK;2. Department of Chemistry, University of Patras, 26504 Patras, Greece;3. Institut Néel, CNRS & Université J. Fourier, BP 166, 38042 Grenoble, Cedex 9, France |
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| Abstract: | We report the synthesis and magnetic properties of three hexametallic Mn clusters: Mn6O2(Et-sao)6(O2C-Naphth)2(EtOH)4(H2O)2] (1) (HO2C-Naphth = 1-naphthoic acid, Et-saoH2 = 2-hydroxyphenylpropanone oxime), Mn6O2(Et-sao)6(O2C-Anthra)2(EtOH)4(H2O)2] · 0.66EtOH · 0.33H2O (HO2C-Anthra = anthracene-9-carboxylic acid) (2 · 0.66EtOH · 0.33H2O) and Mn6O2(Et-sao)6(O2CPhC CH)2(EtOH)4(H2O)2] · 1.7EtOH · 0.3H2O (HO2CPhC CH = 4-ethynylbenzoic acid) (3 · 1.7EtOH · 0.3H2O). Clusters 1–3 exhibit ferromagnetic exchange between all six MnIII centres resulting in S = 12 ground spin states. Ac magnetic susceptibility and single crystal micro-SQUID measurements on 1–3 confirm SMM behaviour with barriers to magnetisation reversal of 60.12 (1), 60.10 (2) and 66.79 (3) K. |
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