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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/61388955:_____/10:00355369

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Mass Spectrometry

ISSN

1387-3806

e-ISSN

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Svazek periodika

290

Číslo periodika v rámci svazku

2-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

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Kód UT WoS článku

000275258700003

EID výsledku v databázi Scopus

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