The Effect of Crystal Packing and ReIV Ions on the Magnetisation Relaxation of [Mn6]‐Based Molecular Magnets. Issue 24 (7th May 2015)

• Record Type: Journal Article
• Authors: Martínez‐Lillo, José; Cano, Joan; Wernsdorfer, Wolfgang; Brechin, Euan K.
• Is Part Of: Chemistry. Volume 21:Issue 24(2015)
• Page Start: 8790
• Page End: 8798
• Publication Date: 2015-05-07
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201500439
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 [Mn₆O₂(R‐sao)₆(X)₂(solvent)_{<italic>y</italic>}] (saoH₂=salicylaldoxime; X=mono‐anion; <italic>y</italic>=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^IVCl₆]²⁻, the energy barrier to magnetisation relaxation is increased by up to 30 %.</p> </abstract>