Previously limited to a maximum of 20 eV photon energy and to studies of only two fragments, C7H7+ and C5H5+, our results extend the data on dissociative photoionization processes of toluene to 100 eV and to >40 observed ion fragments. Retrieved from http://link.aps.org/abstract/PRL/v88/e023001. Few-cycle attosecond pulses with stabilized-carrier-envelope phase in the presence of a strong terahertz field.

[2] Other rearrangement reactions include heterocyclic ring fission (HRF), benzofuran forming fission (BFF), quinone methide (QM) fission or Retro Diels-Alder (RDA).

(or is it just me...), Smithsonian Privacy surface-induced dissociation (SID) using fast moving ions collision with a solid surface, Rennie, E E ; Johnson, Christopher ; Parker, John Eric ; Hayes, M A ; Holland, D M P ; MacDonald, M A ; Shaw, D A ; Shpinkova, L G. /. Spectral phase effects on nonlinear resonant photochemistry of 1,3-cyclohexadiene in solution. [1][2] Fragmentation that occurs in tandem mass spectrometry experiments has been a recent focus of research as this data helps facilitate the identification of molecules. We investigate the influence of continuum generation on the photofragmentation dynamics of the toluene molecule. The simplest case is that a molecular ion breaks into two parts - one of which is another positive ion, and the other is an uncharged free radical. Laser Chemistry, Max Planck Institute of Quantum Optics, Max Planck Society; Kompa,  [2] This can take place by a process of homolytic cleavage/ homolysis or heterolytic cleavage/ heterolysis of the bond. In mass spectrometry, fragmentation is the dissociation of energetically unstable molecular ions formed from passing the molecules in the ionization chamber of a mass spectrometer. 023001. @conference{1157ff5dc75d434790f65e8dd63f5fc8. Laser Chemistry, Max Planck Institute of Quantum Optics, Max Planck Society; Wanner,  INTRODUCTION The study of clusters … [5][6] Tandem mass spectrometry generated fragmentation is typically made in the collision zone (post-source fragmentation) of a tandem mass spectrometer. From the published photoelectron spectra we estimate that at 21.21 eV photon energy, 26.0% of the energy in excess of the first ionization potential is deposited into the parent toluene ion molecular orbitals whose energies lie between its ionization potential and 11.4 eV, which is the onset we observe for the lowest-energy fragmentation process in toluene-h 8 (C 7 H 8 +hν → C 7 H 8 + →C 7 H …

School of Engineering & Physical Sciences, Abstracts of ATMOP XXIII (Atomic, Molecular and Optical Physics), A Mass Spectrometry Study of the Fragmentation in Toluene.

The possible energetics, kinetics, and mechanisms for these fragmentations are discussed. The cation has a radical on a heteroatom or an unsaturated functional group. Powered by Pure, Scopus & Elsevier Fingerprint Engine™ © 2020 Elsevier B.V. We use cookies to help provide and enhance our service and tailor content. electron-detachment dissociation (EDD), Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI.

The pure Cn+ carbon ions, C+, C3+, C4+, C5+ and C7+, are observed at high excitation energies and it is shown that they may derive from CnH+ precursors as well as from dication charge separation processes. Paper presented at Abstracts of ATMOP XXIII (Atomic, Molecular and Optical Physics), Oxford, United Kingdom. By sending an 80-fs Ti:sapphire laser beam through a 2-mm-thick CaF2 plate we show that even moderately broadened laser frequency spectra considerably increase the degree of fragmentation, while it is nearly absent without continuum generation. Paper presented at Abstracts of ATMOP XXIII (Atomic, Molecular and Optical Physics), Oxford, United Kingdom. The fragmentation of toluene + (H20}3 to generate (H20}3H + and a benzyl radical takes place by two distinct pathways with generation times 71 < 60 ns and 72 = 480 ns. I. Present address: Department of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK. By sending an 80-fs Ti:sapphire laser beam through a 2-mm-thick CaF2 plate we show that even moderately broadened laser frequency spectra considerably increase the degree of fragmentation, while it is nearly absent without continuum generation. [2], Majority of organic compounds undergo simple bond cleavage reactions, in which, direct cleavage of bond take place. Two major categories of bond cleavage patterns are simple bond cleavage reactions and rearrangement reactions. Toluene fragmentation by intense femtosecond laser pulses is experimentally investigated. By continuing you agree to the use of cookies, Heriot-Watt Research Portal data protection policy, Heriot-Watt Research Portal contact form. The toluene/ammonia cluster system is studied by mass resolved excitation spectroscopy: like the toluene/water system, an extensive ion chemistry is found to exist generating ammonia solvated protons and (solvated) benzyl radicals. The toluene + (H20}2 fragmentation from toluene + (H20h has a generation time of 7< 60 ns.

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