Molecular hydrogen ion elimination from alkyl iodides under strong laser beam irradiation

C. Kosmidis, S. Kaziannis, P. Siozos, A. Lyras, L. Robson, K.W.D. Ledingham, P. McKenna, D.A. Jaroszynski

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The elimination of H2+ from alkyl iodides under strong (up to 5 × 1015 W cm−2) laser irradiation is studied by means of time-of-flight mass spectrometry. The study has been performed by using 60 fs (λ = 800 nm) and 35 ps (λ = 1064, 532, 355 and 266 nm) laser pulses. It is concluded that the H2+ ions are ejected from ionic states via Coulomb explosion processes. The molecular rearrangement leading to H2+ formation is attributed to a tunneling process through a H transfer barrier. For the case of methyl iodide, about 10% of the doubly charged parent ions undergo molecular rearrangement. From a comparison of the H2+/H+ ion yield ratio of the studied molecules, it turns out that the H2+ formation from H atoms bonded to a terminal carbon atom is more efficient than that arising from H atoms bonded to central C atoms of the molecular chain.
Original languageEnglish
Pages (from-to)1-8
Number of pages7
JournalInternational Journal of Mass Spectrometry
Volume248
Issue number1-2
DOIs
Publication statusPublished - 1 Jan 2006

Fingerprint

Iodides
hydrogen ions
molecular ions
iodides
Laser beams
Protons
elimination
Irradiation
laser beams
Atoms
Hydrogen
irradiation
Ions
atoms
molecular chains
Laser beam effects
Explosions
lasers
Mass spectrometry
explosions

Keywords

  • mass spectrometry
  • molecular hydrogen elimination
  • strong laser field
  • alkyl iodide

Cite this

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title = "Molecular hydrogen ion elimination from alkyl iodides under strong laser beam irradiation",
abstract = "The elimination of H2+ from alkyl iodides under strong (up to 5 × 1015 W cm−2) laser irradiation is studied by means of time-of-flight mass spectrometry. The study has been performed by using 60 fs (λ = 800 nm) and 35 ps (λ = 1064, 532, 355 and 266 nm) laser pulses. It is concluded that the H2+ ions are ejected from ionic states via Coulomb explosion processes. The molecular rearrangement leading to H2+ formation is attributed to a tunneling process through a H transfer barrier. For the case of methyl iodide, about 10{\%} of the doubly charged parent ions undergo molecular rearrangement. From a comparison of the H2+/H+ ion yield ratio of the studied molecules, it turns out that the H2+ formation from H atoms bonded to a terminal carbon atom is more efficient than that arising from H atoms bonded to central C atoms of the molecular chain.",
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year = "2006",
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Molecular hydrogen ion elimination from alkyl iodides under strong laser beam irradiation. / Kosmidis, C.; Kaziannis, S.; Siozos, P.; Lyras, A.; Robson, L.; Ledingham, K.W.D.; McKenna, P.; Jaroszynski, D.A.

In: International Journal of Mass Spectrometry , Vol. 248, No. 1-2, 01.01.2006, p. 1-8.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Molecular hydrogen ion elimination from alkyl iodides under strong laser beam irradiation

AU - Kosmidis, C.

AU - Kaziannis, S.

AU - Siozos, P.

AU - Lyras, A.

AU - Robson, L.

AU - Ledingham, K.W.D.

AU - McKenna, P.

AU - Jaroszynski, D.A.

PY - 2006/1/1

Y1 - 2006/1/1

N2 - The elimination of H2+ from alkyl iodides under strong (up to 5 × 1015 W cm−2) laser irradiation is studied by means of time-of-flight mass spectrometry. The study has been performed by using 60 fs (λ = 800 nm) and 35 ps (λ = 1064, 532, 355 and 266 nm) laser pulses. It is concluded that the H2+ ions are ejected from ionic states via Coulomb explosion processes. The molecular rearrangement leading to H2+ formation is attributed to a tunneling process through a H transfer barrier. For the case of methyl iodide, about 10% of the doubly charged parent ions undergo molecular rearrangement. From a comparison of the H2+/H+ ion yield ratio of the studied molecules, it turns out that the H2+ formation from H atoms bonded to a terminal carbon atom is more efficient than that arising from H atoms bonded to central C atoms of the molecular chain.

AB - The elimination of H2+ from alkyl iodides under strong (up to 5 × 1015 W cm−2) laser irradiation is studied by means of time-of-flight mass spectrometry. The study has been performed by using 60 fs (λ = 800 nm) and 35 ps (λ = 1064, 532, 355 and 266 nm) laser pulses. It is concluded that the H2+ ions are ejected from ionic states via Coulomb explosion processes. The molecular rearrangement leading to H2+ formation is attributed to a tunneling process through a H transfer barrier. For the case of methyl iodide, about 10% of the doubly charged parent ions undergo molecular rearrangement. From a comparison of the H2+/H+ ion yield ratio of the studied molecules, it turns out that the H2+ formation from H atoms bonded to a terminal carbon atom is more efficient than that arising from H atoms bonded to central C atoms of the molecular chain.

KW - mass spectrometry

KW - molecular hydrogen elimination

KW - strong laser field

KW - alkyl iodide

UR - http://dx.doi.org/10.1016/j.ijms.2005.10.004

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DO - 10.1016/j.ijms.2005.10.004

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