Ionization and Dissociation of Benzaldehyde Using Short Intense Laser Pulses

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dc.contributor.authorSmith, D. J.
dc.contributor.authorLedingham, K. W. D.
dc.contributor.authorKılıç, H. S.
dc.contributor.authorMcCanny, T.
dc.contributor.authorPeng, W. X.
dc.contributor.authorSinghal, R. P.
dc.contributor.authorLangley, A. J.
dc.contributor.authorKosmidis, C.
dc.date.accessioned2020-03-26T16:26:12Z
dc.date.available2020-03-26T16:26:12Z
dc.date.issued1998
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractIn a recent series of experiments, femtosecond laser mass spectrometry (FLMS) was applied to benzaldehyde utilizing laser pulse widths in the range 90 fs to 2.7 ps. Beam intensities up to 2 x 10(14) W cm(-2) were used with wavelengths of 750 and 375 nm. Different ionization-dissociation channels were found compared with previous studies by other authors based in the nanosecond regime. The general theme emerging is one of predominant above-threshold ionization-dissociation (ID) in which predissociative states are largely bypassed via rapid optical up-pumping to the molecular ionization continuum. Above the parent ionization threshold, ladder-switching is seen to be a function of laser pulse width, intensity, and wavelength with exclusive parent ion formation being achievable in the lower intensity regions at all pulse widths. Increasing fragmentation occurs as the laser intensity increases, although parent supremacy remains. At 750 nm however, the increase of fragmentation with intensity is greatly reduced compared to 375 nm, leading to the conclusion that FLMS at longer wavelengths is preferred for chemical analysis. Moreover at 750 nm and at laser intensities close to 10(14) W cm(-2) C7H6O2+ becomes evident. It is also shown that the C7H6O+/C7H5O+ ratio is strongly dependent on the pulse width, suggesting that a hydrogen loss pathway has a dissociation time of about a picosecond.en_US
dc.identifier.citationSmith, D. J., Ledingham, K. W. D., Kılıç, H. S., McCanny, T., Peng, W. X., Singhal, R. P., Langley, A. J., Kosmidis, C., (1998). Ionization and Dissociation of Benzaldehyde Using Short Intense Laser Pulses. Journal of Physical Chemistry A, 102(15), 2519-2526. doi: 10.1021/jp9802127
dc.identifier.doi10.1021/jp9802127en_US
dc.identifier.endpage2526en_US
dc.identifier.issn1089-5639en_US
dc.identifier.issue15en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage2519en_US
dc.identifier.urihttps://dx.doi.org/10.1021/jp9802127
dc.identifier.urihttps://hdl.handle.net/20.500.12395/16773
dc.identifier.volume102en_US
dc.identifier.wosWOS:000073271200005en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKılıç, H. S.
dc.language.isoenen_US
dc.publisherAMER CHEMICAL SOCen_US
dc.relation.ispartofJournal of Physical Chemistry Aen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleIonization and Dissociation of Benzaldehyde Using Short Intense Laser Pulsesen_US
dc.typeArticleen_US

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