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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/16154
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dc.contributor.authorTasker, A. D.en
dc.contributor.authorRobson, L.en
dc.contributor.authorLedingham, K. W. D.en
dc.contributor.authorMcCanny, T.en
dc.contributor.authorMcKenna, P.en
dc.contributor.authorKosmidis, C.en
dc.contributor.authorJaroszynski, D. A.en
dc.date.accessioned2015-11-24T18:28:32Z-
dc.date.available2015-11-24T18:28:32Z-
dc.identifier.issn1387-3806-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/16154-
dc.rightsDefault Licence-
dc.subjectnitro-pahsen
dc.subjectfemtosecond ionizationen
dc.subjectlaser desorptionen
dc.subjectmultiple ionizationen
dc.subjectpolycyclic aromatic-hydrocarbonsen
dc.subjectflight mass-spectrometryen
dc.subjectmultiphoton ionizationen
dc.subjectmoleculesen
dc.subjectfragmentationen
dc.subjectnitrobenzeneen
dc.subjectfieldsen
dc.subjectnitrotoluenesen
dc.subjectpulsesen
dc.subjectlighten
dc.titleFemtosecond ionization and dissociation of laser desorbed nitro-PAHsen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.secondary<Go to ISI>://000180448000005-
heal.identifier.secondaryhttp://ac.els-cdn.com/S138738060201045X/1-s2.0-S138738060201045X-main.pdf?_tid=afbcd352ad4b2876f70a9b4b22e60532&acdnat=1334229166_81e566b606ab30267e6e9855f9cbc714-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιώνel
heal.publicationDate2003-
heal.abstractMass spectra of six nitro-PAHs, 5-nitroacenaphthene, 9-nitroanthracene, I -nitropyrene, 3-nitrofluoranthene, 6-nitrochrysene, and 3-nitrobenzanthrone, have been investigated using laser desorption/femtosecond laser mass spectrometry (LD/FLMS). A prominent parent ion was observed for each molecule along with the structurally-characteristic [M - NO](+) and [M - NO2](+) fragments. The consistent observation of the [M - NO](+) and [M - NO - CO](+) ions, in the mass spectra of all the nitro-PAHs, along with the presence of certain doubly charged fragments, is thought to be indicative of a molecular rearrangement. Although this photorearrangement may be occurring within the pulse duration (<80 fs), it is thought that it is more likely to be taking place within the low intensity regions of the laser pulse. In addition to this, an abundance of doubly charged polyatomic ions were observed for the first time in the mass spectra of these molecules under laser irradiation. It was found that only the two smallest molecules (5-nitroacenaphthene and 9-nitroanthracene) were able to generate an observable dication, with the highest-mass doubly charged species corresponding to the [M - NO2](2+) fragment in the remaining molecules. An investigation has also been conducted into the effect of varying the molecular structure of the analyte and the position of the focussed beam. It was found that variation of molecular structure had little effect on the observed fragmentation pathways. However, movement of the focussed beam was found to exert a considerable influence over the observed mass spectra. (C) 2002 Elsevier Science B.V. All rights reserved.en
heal.journalNameInternational Journal of Mass Spectrometryen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
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