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Wavelength‐dependent fragmentation in resonance‐enhanced multiphoton ionization mass spectrometry
Author(s) -
Kinsel Gary R.,
Segar Kimberly R.,
Johnston Murray V.
Publication year - 1987
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210220910
Subject(s) - fragmentation (computing) , ionization , ion , atomic physics , mass spectrometry , kinetic energy , mass spectrum , resonance (particle physics) , atmospheric pressure laser ionization , wavelength , chemistry , spectral line , radiation , electron ionization , materials science , physics , optoelectronics , optics , organic chemistry , chromatography , quantum mechanics , astronomy , computer science , operating system
Wavelength‐dependent effects in the resonance‐enhanced multiphoton ionization/fragmentation mass spectra of p ‐chloroaniline and diphenyl ether are presented. For both molecules, the formation of low‐energy fragments can be discriminated against in favor of higher‐energy fragments by using ‘low’‐energy radiation (290 nm region) for ionization/fragmentation. The same low‐energy fragments become dominant when higher‐energy radiation (266 nm) is used. This unique behavior is explained in terms of the narrow distribution of parent ion internal energies created through resonance‐enhanced multiphoton ionization/fragmentation and the competing kinetic processes accessed by the parent ion as it absorbs each successive photon.