Surface-induced dissociation and reactions of cations and dications C7H8+/2+, C7H7+/2+ and C7H62+: Dependence of mass spectra of product ions on incident energy of the projectiles
| Autor: | Jana Roithová, Linda Feketeová, Paul Scheier, Verena Grill, Z. Herman, T. Tepnual, Tilmann D. Märk |
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| Rok vydání: | 2007 |
| Předmět: |
Projectile
Analytical chemistry Condensed Matter Physics Mass spectrometry Toluene Dissociation (chemistry) Ion chemistry.chemical_compound chemistry Mass spectrum Incident energy Physics::Chemical Physics Physical and Theoretical Chemistry Nuclear Experiment Instrumentation Spectroscopy Electron ionization |
| Zdroj: | International Journal of Mass Spectrometry. 265:337-346 |
| ISSN: | 1387-3806 |
| DOI: | 10.1016/j.ijms.2007.03.017 |
| Popis: | Surface-induced dissociation and reactions of singly-charged ions C 7 H n + ( n = 8, 7) and of doubly-charged ions C 7 H n 2+ ( n = 8, 7, 6), produced by electron ionization of toluene, with hydrocarbon-covered stainless steel surface have been investigated in the incident energy range from 5 to 50 eV. The mass-selected beam of projectile ion was focused onto the surface under 45° and product ions reflected were monitored using a TOF mass spectrometer. The relative abundance of product ions was determined in dependence on incident projectile-ion energy (collision-energy resolved mass spectra, CERMS curves). An important process in surface collisions of the dications is single-electron exchange with the surface and formation of monocation intermediates. Comparison of the mass spectra of the incident cations and dications made it possible to elucidate major reaction pathways. |
| Databáze: | OpenAIRE |
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