Preparation and magnetic properties of Mn<sub>12sub> clusters with 4-cyanobenzenecarboxylate ligand, [Mn<sub>12sub>O<sub>12sub>(O<sub>2sub>CC<sub>6sub>H<sub>4sub>-p-CN)<sub>16sub>(H<sub>2sub>O)<sub>4sub>] and its tetraphenylphosphonium s
- 作者：V.D. Sasnovskaya<sup>asup> ; L.A. Kushch<sup>asup> ; E.B. Yagubskii<sup>asup> ; I.V. Sulimenkov<sup>bsup> ; V.I. Kozlovskiy<sup>bsup> ; V.S. Zagaynova<sup>csup> ; T.L. Makarova<sup>csup><sup> ; sup><sup>dsup><sup> ; sup><sup>tatiana.makarova@physics.umu.sesup>
- 关键词：Molecular magnetism ; Manganese ; Ligand design ; Magnetic property ; Electrospray ionization mass spectrometry
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2012
- 期刊代码：31_03048853
- 类别：ph
- 出版时间：September, 2012
- 卷：324
- 期：18
- 页码：2746-2752
- 文件大小：707 K
摘要
The new Mn<sub>12sub> magnetic clusters with 4-cyanobenzenecarboxylate ligand, [Mn<sub>12sub>O<sub>12sub>(O<sub>2sub>CC<sub>6sub>H<sub>4sub>-p-CN)<sub>16sub>(H<sub>2sub>O)<sub>4sub>] (<strong class="boldFont">1strong>) and its singly (<strong class="boldFont">2strong>) and doubly (<strong class="boldFont">3strong>) 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 Mn<sub>12sub> oxocarboxylate clusters, which are very soluble in CH<sub>3sub>CN or CH<sub>2sub>Cl<sub>2sub>, the complex <strong class="boldFont">1strong> 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 (<strong class="boldFont">2strong>, <strong class="boldFont">3strong>) contain the bulk counterion and dissolve in CH<sub>3sub>CN. They show magnetic properties characteristic for anion Mn<sub>12sub> single-molecule magnets.