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    Infrared laser desorption of hydroquinone from a water-ethanol liquid beam

    Access Status
    Fulltext not available
    Authors
    Otten, D.
    Trevitt, B.
    Nichols, G.
    Metha, G.
    Buntine, Mark
    Date
    2003
    Type
    Journal Article
    
    Metadata
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    Citation
    Otten, Dale E. and Trevitt, Adam J. and Nichols, Benjamin D. and Metha, Gregory F. and Buntine, Mark A. 2003. Infrared laser desorption of hydroquinone from a water-ethanol liquid beam. Journal of Physical Chemistry A 107: pp. 6130-6135.
    Source Title
    Journal of Physical Chemistry A
    DOI
    10.1021/jp022248b
    ISSN
    10895639
    URI
    http://hdl.handle.net/20.500.11937/24356
    Collection
    • Curtin Research Publications
    Abstract

    We have investigated the 1.9-mum IR desorption of hydroquinone in a water/ethanol liquid beam under relatively high desorption laser fluences (1316 and 2632 mJ cm(-2) pulse(-1)). The appearance of the IR desorption/UV ionization TOF mass spectrum of hydroquinone (HQ) is interpreted in terms of dissociation of solvated HQ clusters during the ionization event. The maximum in the hydroquinone desorption velocity distribution is 300 ms-1, and the translational temperature of the desorbed species is approximately 1500 K. We see no evidence for an acoustic compression - ejection mechanism, suggesting that such a process is operative at desorption laser fluences lower than employed here. Our results suggest a general mechanism for the high-powered IR desorption from a liquid beam whereby desorbed species are ejected into the vacuum possessing considerable translational energy but remain internally cool.

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