Title

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

Document Type

Journal Article

Publication Details

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.

Abstract

We describe recent experiments in which mass spectrometry and laser spectroscopy are combined to characterize Li(+)-H(2), Na(+)-H(2), B(+)-H(2), and Al(+)-H(2) complexes in the gas-phase. The infrared spectra, which feature full resolution of rotational sub-structure, are recorded by monitoring M(+) photo fragments 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 straight forward correlation between the frequency shift for the H-H stretch mode and the dissociation energy.

RIS ID

72097

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Link to publisher version (DOI)

http://dx.doi.org/10.1255/ejms.1049