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A multiphoton ionization study of acetone using time-of-flight mass spectrometry

  • Article
  • Chemical Physics
  • Published:
Chinese Science Bulletin

Abstract

The 3p Rydberg states of acetone and photodissociation of the acetone cation were studied using time-of-flight (TOF) mass spectrometry. The 3p Rydberg state spectroscopy of acetone was investigated with linearly polarized two-photon resonance enhanced multiphoton ionization (REMPI) from 320 to 337 nm. Several new transition bands were observed in the spectra. In addition to the CH3COCH3 + ion, CH3CO+ and CH3 + fragments were observed. The laser power dependences suggest that the CH3COCH3 +, CH3CO+ and CH3 + ions are produced in three-, four-, and four-photon processes, respectively. Production of CH3CO+ and CH3 +involves excitation of the ground state acetone cation by an additional photon and subsequent decomposition of the excited acetone ion. The average translational energies of CH3CO+ and CH3 + from dissociation in CH3COCH3 +(X) + hv → CH3CO+ + CH3 and CH3COCH3 +(X) + hv → CH3 + + CH3CO, respectively, were derived from the ion TOF peak profiles.

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Authors and Affiliations

  1. Department of Physics, Anhui Normal University, Wuhu, 241000, China

    XianFeng Zheng, HongXia Wu & ZhiFeng Cui

  2. Department of Chemistry, University of California, Riverside, CA, 92521, USA

    Yu Song, JingZe Wu & JingSong Zhang

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  1. XianFeng Zheng
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  2. HongXia Wu
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  3. Yu Song
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  4. JingZe Wu
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Correspondence to XianFeng Zheng.

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Zheng, X., Wu, H., Song, Y. et al. A multiphoton ionization study of acetone using time-of-flight mass spectrometry. Chin. Sci. Bull. 55, 3123–3130 (2010). https://doi.org/10.1007/s11434-010-3286-7

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  • DOI: https://doi.org/10.1007/s11434-010-3286-7

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