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

A.D. Tasker, L. Robson, K.W.D. Ledingham, T. McCanny, S.M. Hankin, P. McKenna, C. Kosmidis, D.A. Jaroszynski

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The technique of femtosecond laser mass spectrometry has been applied to benzene, nitrobenzene, toluene and nitrotoluene using pulses of 80 fs and λ = 800 nm (1014 − 1016 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/Δm = 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.
LanguageEnglish
Pages4005-4013
Number of pages8
JournalJournal of Physical Chemistry A
Volume106
Issue number16
DOIs
Publication statusPublished - 25 Apr 2002

Fingerprint

Ions
molecular ions
Molecules
toluene
Lasers
Toluene
Benzene
Ultrashort pulses
benzene
Ionization
lasers
molecules
ionization
nitrobenzenes
interactions
polarization (charge separation)
pulses
Ultrafast lasers
ions
Laser beam effects

Keywords

  • nitro-aromatic molecules
  • aromatic molecules
  • femtosecond laser mass spectrometry
  • ions

Cite this

@article{8c2b2eb1755142d68f696bebcc7fd8bc,
title = "A high mass resolution study of the interaction of aromatic and nitro-aromatic molecules with intense laser fields",
abstract = "The technique of femtosecond laser mass spectrometry has been applied to benzene, nitrobenzene, toluene and nitrotoluene using pulses of 80 fs and λ = 800 nm (1014 − 1016 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/Δm = 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.",
keywords = "nitro-aromatic molecules, aromatic molecules, femtosecond laser mass spectrometry, ions",
author = "A.D. Tasker and L. Robson and K.W.D. Ledingham and T. McCanny and S.M. Hankin and P. McKenna and C. Kosmidis and D.A. Jaroszynski",
note = "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.",
year = "2002",
month = "4",
day = "25",
doi = "10.1021/jp013830n",
language = "English",
volume = "106",
pages = "4005--4013",
journal = "Journal of Physical Chemistry A",
issn = "1089-5639",
publisher = "American Chemical Society",
number = "16",

}

A high mass resolution study of the interaction of aromatic and nitro-aromatic molecules with intense laser fields. / Tasker, A.D.; Robson, L.; Ledingham, K.W.D.; McCanny, T.; Hankin, S.M.; McKenna, P.; Kosmidis, C.; Jaroszynski, D.A.

In: Journal of Physical Chemistry A, Vol. 106, No. 16, 25.04.2002, p. 4005-4013.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A high mass resolution study of the interaction of aromatic and nitro-aromatic molecules with intense laser fields

AU - Tasker, A.D.

AU - Robson, L.

AU - Ledingham, K.W.D.

AU - McCanny, T.

AU - Hankin, S.M.

AU - McKenna, P.

AU - Kosmidis, C.

AU - Jaroszynski, D.A.

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 - 2002/4/25

Y1 - 2002/4/25

N2 - The technique of femtosecond laser mass spectrometry has been applied to benzene, nitrobenzene, toluene and nitrotoluene using pulses of 80 fs and λ = 800 nm (1014 − 1016 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/Δm = 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.

AB - The technique of femtosecond laser mass spectrometry has been applied to benzene, nitrobenzene, toluene and nitrotoluene using pulses of 80 fs and λ = 800 nm (1014 − 1016 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/Δm = 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.

KW - nitro-aromatic molecules

KW - aromatic molecules

KW - femtosecond laser mass spectrometry

KW - ions

UR - http://dx.doi.org/10.1021/jp013830n

U2 - 10.1021/jp013830n

DO - 10.1021/jp013830n

M3 - Article

VL - 106

SP - 4005

EP - 4013

JO - Journal of Physical Chemistry A

T2 - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

SN - 1089-5639

IS - 16

ER -