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Crystals 2019, 9(1), 23; https://doi.org/10.3390/cryst9010023

Ferromagnetic Oxime-Based Manganese(III) Single-Molecule Magnets with Dimethylformamide and Pyridine as Terminal Ligands

Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
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Received: 1 December 2018 / Revised: 21 December 2018 / Accepted: 24 December 2018 / Published: 31 December 2018
(This article belongs to the Special Issue Molecular Magnets)
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Abstract

Two new members of the [Mn6] family of single-molecule magnets (SMMs) of formulae [Mn63-O)2(H2N-sao)6(dmf)8](ClO4)2 (1) and [Mn63-O)2(H2N-sao)6(py)6(EtOH)2][ReO4]2·4EtOH (2), (dmf = N,N′-dimethylformamide, py = pyridine, H2N-saoH2 = salicylamidoxime) have been synthesized and characterized structurally and magnetically. Both compounds were straightforwardly prepared from the deprotonation of the H2N-saoH2 ligand in the presence of the desired manganese salt and solvent (dmf (1) vs. py (2)). Compound 1 crystallizes in the triclinic system with space group Pī and 2 crystallizes in the monoclinic system with space group P21/n. In the crystal packing of 1 and 2, the (ClO4) (1) and [ReO4] (2) anions sit between the cationic [Mn6]2+ units, which are H-bonded to –NH2 groups from the salicylamidoxime ligands. The study of the magnetic properties of 1 and 2 revealed ferromagnetic coupling between the MnIII metal ions and the occurrence of slow relaxation of the magnetization, which is a typical feature of single-molecule magnet behavior. The cationic nature of these [Mn6]2+ species suggests that they could be used as suitable building blocks for preparing new magnetic materials exhibiting additional functionalities. View Full-Text
Keywords: manganese(III); salicylamidoxime; molecular magnetism; single-molecule magnets manganese(III); salicylamidoxime; molecular magnetism; single-molecule magnets
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Rojas-Dotti, C.; Moliner, N.; Lloret, F.; Martínez-Lillo, J. Ferromagnetic Oxime-Based Manganese(III) Single-Molecule Magnets with Dimethylformamide and Pyridine as Terminal Ligands. Crystals 2019, 9, 23.

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