Mass spectrometry of hydrogen bonded clusters of heterocyclic molecules: Electron ionization vs. photoionization

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F10%3A00023300" target="_blank" >RIV/60461373:22340/10:00023300 - isvavai.cz</a>
Alternative codes found
RIV/61388955:_____/10:00355369
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Mass spectrometry of hydrogen bonded clusters of heterocyclic molecules: Electron ionization vs. photoionization
Original language description
Clusters of small heteroaromatic ring molecules pyrrole, imidazole and pyrazole were studied in a molecular beam experiment. Neutral cluster size distributions under various expansion conditions were probed by a scattering experiment with a He-atom beam.The clusters were ionized by electrons and their mass spectra were measured by a quadrupole mass spectrometer. Alternatively, the ionization was achieved by a non-resonant subsequent multiphoton process with 193 nm photons and the time-of-flight mass spectra were recorded. (1) The differences in the methods of cluster ionization, namely subsequent multiphoton and single photon ionization, and electron ionization are discussed. (2) More importantly, the differences between the ionization of pyrrole clusters on the one side, and imidazole and pyrazole clusters on the other side are studied. The existence of larger protonated fragments in the latter spectra points to a higher photostability in these N-H center dot center dot center dot N
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
S - Specificky vyzkum na vysokych skolach

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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