A comparison between high-symmetry Mn12 single-molecule magnets in different ligand/solvent environments

S. Hill, N. Anderson, A. Wilson, S. Takahashi, K. Petukhov, N. E. Chakov, M. Murugesu, J. M. North, E. Del Barco, A. D. Kent, N. S. Dalal, G. Christou

    Research output: Contribution to journalArticle

    Abstract

    We present angle-resolved high-frequency electron paramagnetic resonance (HFEPR) data collected for single-crystal samples of deuterated and undeuterated Mn12-acetate. The spectra reveal fine structures associated with the various Mn12 species corresponding to the different local solvent environments proposed by Cornia et al. [A. Cornia, R. Sessoli, L. Sorace, D. Gatteschi, A.L. Barra, C. Daiguebonne, Phys. Rev. Lett. 89 (2002) 257201], and recently confirmed by Hill et al. [S. Hill, R.S. Edwards, S.I. Jones, J.M. North, N.S. Dalal, Phys. Rev. Lett. 90 (2003) 217204] and del Barco et al. [E. del Barco, A.D. Kent, E.M. Rumberger, D.N. Hendrickson, G. Christou, Phys. Rev. Lett. 91 (2003) 047203]. Each of the fine structures exhibits a distinct dependence on the applied field orientation, thereby highlighting the discrete nature of the disorder. We then compare these data with spectra obtained for two recently discovered high-symmetry (S4) analogs of Mn 12-Ac, differing only in their ligand and solvent structures. None of the highly reproducible fine-structures seen in the Mn12-Ac samples are found for the new Mn12 complexes, thus confirming the idea that the solvent structure significantly influences the QMT dynamics in Mn 12-Ac. Indeed, the HFEPR spectra for Mn12-BrAc and Mn 12-tBuAc provide spectacular resolution, allowing for unique spectroscopic insights into high-symmetry giant spin SMMs.

    Original languageEnglish (US)
    Pages (from-to)2284-2292
    Number of pages9
    JournalPolyhedron
    Volume24
    Issue number16-17
    DOIs
    StatePublished - Nov 17 2005

    Keywords

    • Electron paramagnetic resonance
    • Manganese
    • Nanomagnet
    • Quantum tunneling
    • Single molecule magnets

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Inorganic Chemistry
    • Materials Chemistry

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  • Cite this

    Hill, S., Anderson, N., Wilson, A., Takahashi, S., Petukhov, K., Chakov, N. E., Murugesu, M., North, J. M., Del Barco, E., Kent, A. D., Dalal, N. S., & Christou, G. (2005). A comparison between high-symmetry Mn12 single-molecule magnets in different ligand/solvent environments. Polyhedron, 24(16-17), 2284-2292. https://doi.org/10.1016/j.poly.2005.03.079