Multiple ionization, charge separation and charge stripping reactions involving polycyclic aromatic compounds

Kingston, R. G.; Guilhaus, Michael; Brenton, A.G.; Beynon, J. H.

doi:10.1002/oms.1210200605

Cited by 67 publications

(55 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present experiments show that C 16 expected for C 24 H 5+ 12 a small feature is present. The presently observed critical PAH charge state and multiply charged cations relative intensities are higher than those previously observed for coronene and pyrene using other ionization methods [18,28,43]. Recently, Yatsuhashi and Nakashima observed a high relative yield of multiply charged PAHs (up to 4+) using intense femtosecond-laser pulses [44], but these studies did not include pyrene or coronene.…”

Section: B Multiply Charged Molecular Cationsmentioning

confidence: 64%

“…For example, in photodissociation and low-energy CID studies of pyrene, the emission of acetylene molecules C 2 H 2 was reported [9,25]. Furthermore, for different small PAHs (up to four fused rings), Kingston et al [43] observed that a charge separation occurs for doubly and triply charged cations, leading to the formation of CH + 3 , C 2 H + 2 , and C 3 H + 3 ions and other charged products. In the case of pyrene an additional decay pathway results in the loss of C 4 H + 2 .…”

Section: Loss Of Neutral and Charged C N H X Moleculesmentioning

confidence: 99%

See 1 more Smart Citation

Multiple ionization and fragmentation of isolated pyrene and coronene molecules in collision with ions

et al. 2011

View full text Add to dashboard Cite

International audienceThe interaction of multiply charged ions (He(2+), O(3+), and Xe(20+)) with gas-phase pericondensed polycyclic aromatic hydrocarbon (PAH) molecules of coronene (C(24)H(12)) and pyrene (C(16)H(10)) is studied for low-velocity collisions (v <= 0.6 a.u.). The mass spectrometric analysis shows that singly and up to quadruply charged intact molecules are important reaction products. The relative experimental yields are compared with the results of a simple classical over-the-barrier model. For higher molecular charge states, the experimental yields decrease much more strongly than the model predictions due to the instabilities of the multiply charged PAH molecules. Even-odd oscillations with the number of carbon atoms, n, in the intensity distributions of the C(n)H(x)(+) fragments indicate a linear chain structure of the fragments similar to those observed for ion-C(60) collisions. The latter oscillations are known to be due to dissociation energy differences between even-and odd-n C(n)-chain molecules. For PAH molecules, the average numbers of H atoms attached to the C(n)H(x) chains are larger for even-n reflecting acetylenic bond systems

show abstract

Section: B Multiply Charged Molecular Cationsmentioning

confidence: 64%

Section: Loss Of Neutral and Charged C N H X Moleculesmentioning

confidence: 99%

Multiple ionization and fragmentation of isolated pyrene and coronene molecules in collision with ions

et al. 2011

View full text Add to dashboard Cite

show abstract

“…This is in agreement with the earlier work of Kingston et al who observed about a factor of 4 ϫ10 Ϫ8 less triply charged benzene than the singly charged species. 18 The hydrocarbon fragment ions of benzene containing 4 or 5 carbon atoms were mass selected and crossed with the electron beam. The ion signal of these mass peaks is free of contributions of multiply charged molecular ions.…”

Section: Methodsmentioning

confidence: 99%

“…Benzene and other cyclic molecules turn out to resist Coulomb explosion much better than many other small molecules. 9,18,19 Burdick and co-workers observed triply charged molecules of the smallest heterocyclic aromatic compounds C 4 H 4 X ͑XϭNH, O, and S͒. 19 Kingston et al investigated the multiple ionization of polycyclic aromatic compounds.…”

Section: Introductionmentioning

confidence: 99%

“…19 Kingston et al investigated the multiple ionization of polycyclic aromatic compounds. 18 They observed that the triply charged benzene molecule is more than 7.5 orders of magnitude less abundant in their mass spectra than the singly charged ion C 6 H 6 ϩ . In the present work small multiply charged hydrocarbon molecules were formed by the electron impact ionization of singly charged fragment ions of benzene.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Formation and dissociation of triply charged fragment ions of benzene

Scheuermann

Salzborn

Hagelberg

et al. 2001

The Journal of Chemical Physics

View full text Add to dashboard Cite

Electron impact ionization of small singly charged hydrocarbon ions was applied to produce and investigate multiply charged molecular ions. The stability of triply charged hydrocarbon ions depends strongly on the number of hydrogen atoms of the molecule. C4Hj3+ were observed only for molecules that contain more than 2 hydrogen atoms. Parallel, highly correlated ab initio calculations were performed for these molecular ions. The binding energies obtained by these computations agree well with the experimental findings. Moreover, there is quantitative agreement between the experiment and the calculations on the kinetic energy of the fragment ions upon Coulomb explosion.

show abstract

Kleine organische Dikationen – Symbiose von Gasphasenexperimenten und MO‐Berechnungen

1989

View full text Add to dashboard Cite

Die Chemie von Molekiilen -unbesehen, o b diese neutral, ionisch oder radikalisch sind -zu verstehen, setzt Kenntnis ihrer Struktur und Bindungseigenschaften voraus. Dikationen sind ideale Forschungsobjekte, da bei ihnen das Zusamnienspiel von elektrostatischer AbstoBung (,,Coulomb-Explosion") und kovalenter Bindung einen tieferen Einblick in die Bindungssituation elektronenarmer Molekiile ermoglicht, als das bei Monokationen der Fall ist. Kleine organische Dikationen lassen sich heute mit einer Vielzahl massenspektrometrischer Methoden routinemaBig in der Gasphase darstellen, und die ab-initio-MO-Methoden sind mittlerweile so perfektioniert worden, daR Potentialhyperflachen kleiner Molekiile ziemlich genau vorausberechnet werden konnen. In dieser Ubersicht wird zum einen die fruchtbare Wechselwirkung zwischen Theorie und Experiment beleuchtet und zum anderen versucht, die Besonderheiten der Bindungsverhaltnisse in doppelt geladenen organischen Kationen in einem groBeren Zusammenhang zu beschreiben sowie eine Art ,,Aufbauprinzip" zu entwickeln, das es ermoglicht, die Strukturen groRerer Dikationen aus denen kleiner .,Bausteine" herzuleiten.

show abstract

Multiple ionization, charge separation and charge stripping reactions involving polycyclic aromatic compounds

Cited by 67 publications

References 22 publications

Multiple ionization and fragmentation of isolated pyrene and coronene molecules in collision with ions

Multiple ionization and fragmentation of isolated pyrene and coronene molecules in collision with ions

Formation and dissociation of triply charged fragment ions of benzene

Kleine organische Dikationen – Symbiose von Gasphasenexperimenten und MO‐Berechnungen

Contact Info

Product

Resources

About