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Ionisation and fragmentation of polycyclic aromatic hydrocarbons by femtosecond laser pulses at wavelengths resonant with cation transitions

Robson, L. and Ledingham, K.W.D. and Tasker, A.D. and McKenna, P. and McCanny, T. and Kosmidis, C. and Jaroszynski, D.A. and Jones, D.R. and Issac, R.C. (2002) Ionisation and fragmentation of polycyclic aromatic hydrocarbons by femtosecond laser pulses at wavelengths resonant with cation transitions. Chemical Physics Letters, 360 (3-4). pp. 382-389. ISSN 0009-2614

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Abstract

When femtosecond laser pulses irradiate hydrocarbon molecules, then many fragmentation channels evident in nanosecond irradiation are bypassed, providing a strong analytically useful parent ion. However a number of molecules show only a very small or indeed no parent ions and recent papers suggest that those that do not produce parent peaks have cation transitions in resonance with the femtosecond laser wavelength. This Letter shows that this resonance effect is not universal and some aromatic molecules not only show strong parent peaks but also doubly and triply ionised entities when their cation absorption spectrum is strongly resonant at either the 800 or 400 nm or indeed both.

Item type: Article
ID code: 17398
Notes: Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
Keywords: ionisation, fragmentation, polycyclic aromatic hydrocarbons, femtosecond laser pulses, wavelengths, Physics, Physics and Astronomy(all), Physical and Theoretical Chemistry
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 29 Apr 2010 19:05
    Last modified: 05 Sep 2014 01:17
    URI: http://strathprints.strath.ac.uk/id/eprint/17398

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