Control of the transition temperatures of metallomesogens by specific interface design: application to Mn12 single molecule magnets |
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| Authors: | Terazzi E Jensen T B Donnio B Buchwalder K Bourgogne C Rogez G Heinrich B Gallani J Piguet C |
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| Institution: | Department of Inorganic, Analytical and Applied Chemistry, University of Geneva, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland. Emmanuel.Terazzi@unige.ch |
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| Abstract: | Reaction of the Single Molecule Magnet Mn(12)O(12)(CH(3)CO(2))(16)(H(2)O)(4)] (Mn(12)) with mesogenic dendritic ligands Li (i = 4, 5) quantitatively yields functional clusters Mn(12)O(12)(Li-H)(16)(H(2)O)(4)] (i = 4, 5) that self-organize into a thermotropic SmA-type liquid crystalline phase. The perturbation of the molecular interface by methylation of the terminal mesogenic cyanobiphenyl groups induces a significant decrease of the clearing temperature without affecting the magnetic properties and the supramolecular organization of the Mn(12)-based clusters. |
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