Preparation and magnetic properties of Mn-12 clusters with 4-cyanobenzenecarboxylate ligand, [Mn12O12(O2CC6H4-p-CN)(16)(H2O)(4)] and its tetraphenylphosphonium salts
2012 (English)In: Journal of Magnetism and Magnetic Materials, ISSN 0304-8853, Vol. 324, no 18, 2746-2752 p.Article in journal (Other academic) Published
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 analogues 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 behaviour. 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.
Place, publisher, year, edition, pages
2012. Vol. 324, no 18, 2746-2752 p.
Molecular magnetism, Manganese, Ligand design, Magnetic properties, Electrospray ionization mass spectrometry
IdentifiersURN: urn:nbn:se:umu:diva-53565DOI: 10.1016/j.jmmm.2012.03.061ISI: 000304762400011OAI: oai:DiVA.org:umu-53565DiVA: diva2:513503