Preparation and magnetic properties of Mn12 clusters with 4-cyanobenzenecarboxylate ligand, [Mn12O12(O2CC6H4-p-CN)16(H2O)4] and its tetraphenylphosphonium salts |
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| Authors: | VD Sasnovskaya LA Kushch EB Yagubskii IV Sulimenkov VI Kozlovskiy VS Zagaynova TL Makarova |
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| Institution: | 1. Institute of Problems of Chemical Physics, RAS, 142432 Chernogolovka, Moscow Region, Russia;2. Branch of Institute for Energy Problems of Chemical Physics, RAS, 142432 Chernogolovka, Moscow Region, Russia;3. Department of Physics, Umeå University, Umeå 90187, Sweden;4. Ioffe PTI, St. Petersburg 194021, Russia |
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| Abstract: | The new Mn12 magnetic clusters with 4-cyanobenzenecarboxylate ligand, Mn12O12(O2CC6H4-p-CN)16(H2O)4] (1) and its singly (2) and doubly (3) reduced analogs as their tetraphenylphosphonium salts, have been synthesized and characterized by elemental analyses, Raman, ESI-MS spectra and magnetic measurements with a SQUID magnetometer. Unlike the known Mn12 oxocarboxylate clusters, which are very soluble in CH3CN or CH2Cl2, the complex 1 is not dissolved in organic solvents providing an indication for strong intermolecular interactions which lead to strong dipole–dipole interactions between clusters and affect the magnetic behavior. The one-electron and two-electron reduced clusters (2, 3) contain the bulk counterion and dissolve in CH3CN. They show magnetic properties characteristic for anion Mn12 single-molecule magnets. |
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| Keywords: | Molecular magnetism Manganese Ligand design Magnetic property Electrospray ionization mass spectrometry |
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