Spectroscopic Characterization of the Product Ions Formed by Electron Ionization of Adamantane. Journal Article uri icon



  • A structural characterization of the products formed in the dissociative electron ionization of adamantane (C10 H16 ) is presented. Molecular structures of product ions are suggested based on multiple-photon dissociation spectroscopy using the Free Electron Laser for Infrared eXperiments (FELIX) in combination with quantum-chemical calculations. Product ions are individually isolated in an ion trap tandem mass spectrometer and their action IR spectra are recorded. Atomic hydrogen loss from adamantane yields the 1-adamantyl isomer. The IR spectrum of the C8 H11 + product ion is best reproduced by computed spectra of 2- and 4-protonated meta-xylene and ortho- and para-protonated ethylbenzenes. The spectrum of the product ion at m/z 93 suggests that it is composed of a mixture of ortho-protonated toluene, para-protonated toluene and 1,2-dihydrotropylium, while the spectrum of the m/z 79 ion is consistent with the benzenium ion. This study thus suggests that adamantane is efficiently converted into aromatic species and astrophysical implications for the interstellar medium are highlighted.

publication date

  • October 11, 2018

has restriction

  • hybrid

Date in CU Experts

  • August 30, 2023 12:35 PM

Full Author List

  • Bouwman J; Horst S; Oomens J

author count

  • 3

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1439-7641

Additional Document Info

start page

  • 3211

end page

  • 3218


  • 19


  • 23