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- W657243323 abstract "Progress in molecular secondary ion mass spectrometry (SIMS) is presented, with emphasis on applications and the mechanism of ion formation. The mechanism involves three processes: (1) energy conversion at the surface, (2) ion/molecule and electron transfer reactions in the selvedge, and (3) unimolecular dissociations of internally excited gas phase ions. The role of matrix effects in mechanistic studies is discussed, as are experiments which use chemical reactivity to gain insights into mechanism. The use of tandem mass spectrometry (MS/MS) in ion structural determinations in SIMS and other desorption ionization experiments is illustrated. MS/MS provides evidence for unimolecular dissociations of gas phase ions, which appear to underlie much of the fragmentation seen in molecular SIMS. Cases of strong molecule-surface interactions can result in dissociation insitu, however, and examples are collected. Applications of molecular SIMS in quantitative and trace analysis, chromatography, studies of ion chemistry, catalysis, and imaging are reviewed. Developing areas in molecular SIMS include highly endothermic fragmentations and ion beam induced surface reactions." @default.
- W657243323 created "2016-06-24" @default.
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- W657243323 date "1985-10-17" @default.
- W657243323 modified "2023-09-23" @default.
- W657243323 title "Desorption Mass Spectrometry" @default.
- W657243323 doi "https://doi.org/10.1021/bk-1985-0291" @default.
- W657243323 hasPublicationYear "1985" @default.
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