A high mass resolution study of the interaction of aromatic and nitro-aromatic molecules with intense laser fields

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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.authorHankin, S. M.en
dc.contributor.authorMcKenna, P.en
dc.contributor.authorKosmidis, C.en
dc.contributor.authorJaroszynski, D. A.en
dc.contributor.authorJones, D. R.en
dc.date.accessioned2015-11-24T18:33:43Z
dc.date.available2015-11-24T18:33:43Z
dc.identifier.issn1089-5639-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/16791
dc.rightsDefault Licence-
dc.subjectmulti-photon ionizationen
dc.subjectmultiphoton ionizationen
dc.subjectpolyatomic-moleculesen
dc.subjectfemtosecond laseren
dc.subjectcharged ionsen
dc.subjectfragmentationen
dc.subjectnitrobenzeneen
dc.subjectdissociationen
dc.subjectbenzeneen
dc.subjectpulseen
dc.titleA high mass resolution study of the interaction of aromatic and nitro-aromatic molecules with intense laser fieldsen
heal.abstractThe technique of femtosecond laser mass spectrometry has been applied to benzene, nitrobenzene, toluene and nitrotoluene using pulses of 80 fs and lambda = 800 nm (10(14) - 10(16) W cm(-2)). The ultrafast laser pulses used were able to largely defeat the dissociation pathways associated with nanosecond ionization and produce a molecular ion for both the aromatics and the two photounstable nitro-aromatics. The high mass resolution (m/Deltam = 800) permitted, for the first time, the observation of various doubly charged species and allowed a study of the effect of the substituent NO2 group on the multiple ionization process. It was found that the femtosecond laser irradiation of benzene and toluene enabled the production of a doubly charged cation envelope in each case along with an additional doubly ionized contribution from certain lower mass fragments. Doubly ionized species were also observed for the nitro-aromatics including, most notably the loss of NO2 doubly charged ion ([M-NO2](2+)) although a doubly charged parent was not observed. In addition, an NO2+ ion was detected for both nitro-aromatics which was thought to be evidence of a "charge-separation" process involving a transient doubly charged molecular ion.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.secondary<Go to ISI>://000175169600003-
heal.identifier.secondaryhttp://pubs.acs.org/doi/pdfplus/10.1021/jp013830n-
heal.journalNameJournal of Physical Chemistry Aen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2002-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιώνel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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