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Generation of C6H4+. by laser vaporization of magnesium with o-C6H4F2 in argon carrier gas

  • Haichuan Liu
  • , Shihe Yang
  • , Iulia Balteanu
  • , O. Petru Balaj
  • , Brigitte S. Fox-Beyer
  • , Martin K. Beyer
  • , Vladimir E. Bondybey
  • Hong Kong University of Science and Technology
  • Technical University of Munich

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A route to efficient generation of C6H4+., potentially the benzyne radical cation, is presented. Laser vaporization of Mg+. and supersonic expansion in helium doped with o-, m-, or p-C6H4F2 yields, among other ions, o-, m-, p-C6H4F2Mg+. complexes, but no C6H4+.. Collision-induced dissociation experiments show that the o-C6H4F2Mg +. complex can be converted into C6H4 +. in a mildly energetic collision, with a center-of-mass energy around 1-2 eV. These conditions can also be reached in the ion source when argon is used as a carrier gas. In this way, mass spectra containing the desired m/z 76 peak, i.e. C6H4+., are obtained.

Original languageEnglish
Pages (from-to)1479-1481
Number of pages3
JournalRapid Communications in Mass Spectrometry
Volume18
Issue number13
DOIs
StatePublished - 2004

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