Single-crystal parallel-mode EPR spectroscopy of an S=6 ground-state transition-metal cluster

Piligkos, Stergios, Collison, David, Oganesyan, Vasily S. ORCID:, Rajaraman, Gopalan, Timco, Grigore A., Thomson, Andrew J., Winpenny, Richard E. P. and McInnes, Eric J. L. (2004) Single-crystal parallel-mode EPR spectroscopy of an S=6 ground-state transition-metal cluster. Physical Review B - Condensed Matter and Materials Physics, 69 (13). 134424-1-134424-8. ISSN 0163-1829

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We present a parallel-mode EPR study of a very high-spin ground-state cluster complex [Cr12O9(OH)3(O 2CCMe3)15], where Me indicates the methyl group. This high-symmetry (D3) molecule has a well-isolated S=6 ground state characterized by D=+0.088 cm-1, E=0, g zz=1,965, gxx=gyy=1.960. Low-temperature (5 K) single-crystal and powder parallel- and perpendicular-mode EPR spectra are presented. The forms of the spectra are discussed with respect to the composition of the wave functions as a function of the angle of the static magnetic field to the molecular Z axis, the selection rules of the two excitation modes, and the resultant transition probabilities. This is the largest spin state studied by parallel mode EPR spectroscopy to date, and the results demonstrate the applicability of parallel-mode EPR to high-spin ground-state molecular clusters such as single-molecule magnets.

Item Type: Article
Uncontrolled Keywords: electronic, optical and magnetic materials,condensed matter physics ,/dk/atira/pure/subjectarea/asjc/2500/2504
Faculty \ School: Faculty of Science > School of Chemistry
Faculty of Science > School of Chemical Sciences and Pharmacy (former - to 2009)
UEA Research Groups: Faculty of Science > Research Groups > Centre for Photonics and Quantum Science
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Depositing User: LivePure Connector
Date Deposited: 08 Jul 2021 00:07
Last Modified: 09 Feb 2023 13:49
DOI: 10.1103/PhysRevB.69.134424

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