The Effect of Crystal Packing and Re(IV) Ions on the Magnetisation Relaxation of [Mn6 ]-Based Molecular Magnets

José Martínez-Lillo, Joan Cano, Wolfgang Wernsdorfer, Euan K Brechin

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The energy barrier to magnetisation relaxation in single-molecule magnets (SMMs) proffers potential technological applications in high-density information storage and quantum computation. Leading candidates amongst complexes of 3d metals ions are the hexametallic family of complexes of formula [Mn6 O2 (R-sao)6 (X)2 (solvent)y ] (saoH2 =salicylaldoxime; X=mono-anion; y=4-6; R=H, Me, Et, and Ph). The recent synthesis of cationic [Mn6 ][ClO4 ]2 family members, in which the coordinating X ions were replaced with non-coordinating anions, opened the gateway to constructing families of novel [Mn6 ] salts in which the identity and nature of the charge balancing anions could be employed to alter the physical properties of the complex. Herein we demonstrate initial experiments to show that this is indeed possible. By replacing the diamagnetic ClO4 (-) anions with the highly anisotropic Re(IV) ion in the form of [Re(IV) Cl6 ](2-) , the energy barrier to magnetisation relaxation is increased by up to 30 %.

Original languageEnglish
Pages (from-to)8790–8798
JournalChemistry - A European Journal
Volume21
Issue number24
Early online date28 May 2015
DOIs
Publication statusPublished - Jun 2015

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