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

L. Robson, K.W.D. Ledingham, A.D. Tasker, P. McKenna, T. McCanny, C. Kosmidis, D.A. Jaroszynski, D.R. Jones, R.C. Issac

Research output: Contribution to journalArticle

39 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)382-389
Number of pages7
JournalChemical Physics Letters
Volume360
Issue number3-4
DOIs
Publication statusPublished - 10 Jul 2002

Fingerprint

Polycyclic Aromatic Hydrocarbons
polycyclic aromatic hydrocarbons
Ultrashort pulses
Ionization
Cations
fragmentation
cations
ionization
Wavelength
Molecules
pulses
wavelengths
Ions
lasers
Hydrocarbons
molecules
Absorption spectra
Irradiation
ions
hydrocarbons

Keywords

  • ionisation
  • fragmentation
  • polycyclic aromatic hydrocarbons
  • femtosecond laser pulses
  • wavelengths

Cite this

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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.",
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Ionisation and fragmentation of polycyclic aromatic hydrocarbons by femtosecond laser pulses at wavelengths resonant with cation transitions. / Robson, L.; Ledingham, K.W.D.; Tasker, A.D.; McKenna, P.; McCanny, T.; Kosmidis, C.; Jaroszynski, D.A.; Jones, D.R.; Issac, R.C.

In: Chemical Physics Letters, Vol. 360, No. 3-4, 10.07.2002, p. 382-389.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ionisation and fragmentation of polycyclic aromatic hydrocarbons by femtosecond laser pulses at wavelengths resonant with cation transitions

AU - Robson, L.

AU - Ledingham, K.W.D.

AU - Tasker, A.D.

AU - McKenna, P.

AU - McCanny, T.

AU - Kosmidis, C.

AU - Jaroszynski, D.A.

AU - Jones, D.R.

AU - Issac, R.C.

N1 - 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.

PY - 2002/7/10

Y1 - 2002/7/10

N2 - 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.

AB - 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.

KW - ionisation

KW - fragmentation

KW - polycyclic aromatic hydrocarbons

KW - femtosecond laser pulses

KW - wavelengths

UR - http://dx.doi.org/10.1016/S0009-2614(02)00872-2

U2 - 10.1016/S0009-2614(02)00872-2

DO - 10.1016/S0009-2614(02)00872-2

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

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