Hexanuclear manganese(III) single-molecule magnets from derivatized salicylamidoximes |
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| Authors: | José Martínez-Lillo Lise-Marie Chamoreau Anna Proust Michel Verdaguer Pierre Gouzerh |
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| Institution: | 1. Institut parisien de chimie moléculaire, UMR CNRS 7201, case courrier 42, université Pierre et Marie Curie Paris 6, 4, place Jussieu, 75252 Paris cedex 05, France;2. Institut universitaire de France, 75005 Paris, France |
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| Abstract: | Four novel hexanuclear manganese(III) complexes based on derivatized salicylamidoximes, MnIII6(μ3-O)2(O2CPh)2(Me2N-sao)6(EtOH)4] (1), MnIII6(μ3-O)2(O2CPh)2(Me2N-sao)6(iPrOH)4] (2), MnIII6(μ3-O)2(O2CPh)2(Et2N-sao)6(EtOH)4] (3) and MnIII6(μ3-O)2(O2CPh)2(Et2N-sao)6(iPrOH)4] (4) (Me2N-Hsao = dimethylsalicylamidoxime; Et2N-Hsao = diethylsalicylamidoxime), have been prepared and characterized. Single-crystal X-ray diffraction allows one to determine that 1·2CHCl3 and 4 crystallize in the triclinic system with space group P(–1), whereas 3 crystallizes in the monoclinic system with space group P21/n. dc and ac magnetic susceptibility measurements of 1-4 reveal ferromagnetic coupling between Mn(III) metal ions and single-molecule magnet behaviour. The anisotropy barriers are 56, 52, 71 and 59 K for 1, 2, 3 and 4, respectively. |
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| Keywords: | Manganese(III) complexes Salicylamidoximes Crystal structures Magnetic properties Single-molecule magnets |
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