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Rare “Janus”-faced Image ID:c8sc04384a-t1.gif single-molecule magnet exhibiting intramolecular ferromagnetic interactions

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Abstract

A rare Image ID:c8sc04384a-t3.gif disk-like single-molecule magnet (SMM) exclusively bridged by end-on azides with a spin ground state of S = 14 was prepared by the reaction of a divalent FeII precursor with Me3SiN3 under basic conditions. AC magnetic susceptibility studies revealed unusual, “Janus”-faced SMM behavior for the dried and pristine forms of the Image ID:c8sc04384a-t4.gif compound attributed to solvation/de-solvation effects of the coordinated MeCN ligands which leads to alterations in the crystal field and symmetry of the metal ions. DFT calculations confirmed the ferromagnetic nature of the interactions between the FeII spin carriers with the zero-field splitting parameters D = −0.2323 cm−1 and E/D = 0.027. The results have important implications for the future study of single-molecule magnets incorporating volatile solvent molecules in the first coordination sphere of the metal ions and their effect on the relaxation dynamics.

Graphical abstract: Rare “Janus”-faced single-molecule magnet exhibiting intramolecular ferromagnetic interactions

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Publication details

The article was received on 03 Oct 2018, accepted on 03 Nov 2018 and first published on 05 Nov 2018


Article type: Edge Article
DOI: 10.1039/C8SC04384A
Citation: Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Rare “Janus”-faced Image ID:c8sc04384a-t1.gif single-molecule magnet exhibiting intramolecular ferromagnetic interactions

    D. I. Alexandropoulos, K. R. Vignesh, T. C. Stamatatos and K. R. Dunbar, Chem. Sci., 2019, Advance Article , DOI: 10.1039/C8SC04384A

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