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    Reorientational Motions and Ionic Conductivity in (NH4)2B10H10 and (NH4)2B12H12

    Access Status
    Fulltext not available
    Authors
    Gradišek, A.
    Krnel, M.
    Paskevicius, Mark
    Hansen, B.
    Jensen, T.
    Dolinsek, J.
    Date
    2018
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Gradišek, A. and Krnel, M. and Paskevicius, M. and Hansen, B. and Jensen, T. and Dolinsek, J. 2018. Reorientational Motions and Ionic Conductivity in (NH4)2B10H10 and (NH4)2B12H12. 122 (30): pp. 17073–17079.
    Source Title
    Journal of Physical Chemistry C
    DOI
    10.1021/acs.jpcc.8b04605
    ISSN
    1932-7447
    School
    School of Electrical Engineering, Computing and Mathematical Science (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FT160100303
    URI
    http://hdl.handle.net/20.500.11937/69884
    Collection
    • Curtin Research Publications
    Abstract

    We investigated molecular dynamics in two ammonium borane systems from the group of promising ion conductors. The investigation was performed by means of 1H and 11B NMR spectroscopy and spin-lattice relaxation techniques. We identified two reorientational processes, the rotations of NH4 units that are present already at low temperatures, and rotations of large boron cages, B10H10 or B12H12, which are thermally activated and become prominent above 250 K. Activation energies for these processes were determined. In addition, solid-state ion conductivity measurements were conducted to determine poor NH4 conductivity of both systems.

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