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Mixing laser spectroscopy and mass spectrometry- infrared spectra of metal cation- hydrogen complexes

Journal Article


Abstract


  • We describe recent experiments in which mass spectrometry and laser spectroscopy are combined to characterize Li+-H2, Na +-H2, B+-H2 and Al +-H2 complexes in the gas-phase. The infrared spectra, which feature full resolution of rotational sub-structures, are recorded by monitoring M+ photofragments as the infrared wavelength is scanned. The spectra deliver detailed information on the way, in which a hydrogen molecule is attached to a metal cation including the intermolecular separation, the force constant for the intermolecular bond and the H-H stretching frequency. The complexes all possess T-shaped equilibrium geometries and display a clear correlation between the length and force constant of the intermolecular bond and the dissociation energy. In contrast, the data do not support any straightforward correlation between the frequency shift for the H-H stretch mode and the dissociation energy.

UOW Authors


  •   Bieske, Evan J. (external author)
  •   Dryza, Viktoras (external author)
  •   Poad, Berwyck L. J.

Publication Date


  • 2010

Citation


  • Dryza, V., Poad, B. L. J. & Bieske, E. J. (2010). Mixing laser spectroscopy and mass spectrometry- infrared spectra of metal cation- hydrogen complexes. European Journal of Mass Spectrometry, 16 (3), 415-420.

Scopus Eid


  • 2-s2.0-77955484565

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4618

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 415

End Page


  • 420

Volume


  • 16

Issue


  • 3

Abstract


  • We describe recent experiments in which mass spectrometry and laser spectroscopy are combined to characterize Li+-H2, Na +-H2, B+-H2 and Al +-H2 complexes in the gas-phase. The infrared spectra, which feature full resolution of rotational sub-structures, are recorded by monitoring M+ photofragments as the infrared wavelength is scanned. The spectra deliver detailed information on the way, in which a hydrogen molecule is attached to a metal cation including the intermolecular separation, the force constant for the intermolecular bond and the H-H stretching frequency. The complexes all possess T-shaped equilibrium geometries and display a clear correlation between the length and force constant of the intermolecular bond and the dissociation energy. In contrast, the data do not support any straightforward correlation between the frequency shift for the H-H stretch mode and the dissociation energy.

UOW Authors


  •   Bieske, Evan J. (external author)
  •   Dryza, Viktoras (external author)
  •   Poad, Berwyck L. J.

Publication Date


  • 2010

Citation


  • Dryza, V., Poad, B. L. J. & Bieske, E. J. (2010). Mixing laser spectroscopy and mass spectrometry- infrared spectra of metal cation- hydrogen complexes. European Journal of Mass Spectrometry, 16 (3), 415-420.

Scopus Eid


  • 2-s2.0-77955484565

Ro Metadata Url


  • http://ro.uow.edu.au/scipapers/4618

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 415

End Page


  • 420

Volume


  • 16

Issue


  • 3