Time-resolved laser desorption. III. The metastable decomposition of chlorophyll-a and some derivatives

Jean Claude Tabet, Marc Jablonski, Robert J. Cotter, Jerry E. Hunt

Research output: Contribution to journalArticlepeer-review

Abstract

Chlorophyll-a is ionized by laser desorption in a field-free, grounded ion source of a time-of-flight mass spectrometer. The use of a time delay between the ionizing laser pulse and the ion drawout pulse permits metastable decompositions to occur prior to mass analysis. The fragmentation pattern observed in the resultant mass spectra varies with the magnitude of the time delay and is consistent with multistep fragmentation processes for which the rate constants are of the order of 105-106 s-1. Two derivatives are also examined, for which metastable decomposition is not observed.

Original languageEnglish (US)
Pages (from-to)105-117
Number of pages13
JournalInternational Journal of Mass Spectrometry and Ion Processes
Volume65
Issue number1-2
DOIs
StatePublished - May 10 1985

ASJC Scopus subject areas

  • Spectroscopy

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