University of Illinois Urbana-Champaign

Photodissociation And Velocity-map Imaging Of Carbon Cluster Cations

Dynak, Nathan John

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WH01_1.pptx
6453.pdf

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https://hdl.handle.net/2142/116885

Description

Title
Photodissociation And Velocity-map Imaging Of Carbon Cluster Cations
Author(s)
Dynak, Nathan John
Contributor(s)
  • Duncan, Michael A.
  • Kellar, Douglas J.
  • Colley, Jason E.
  • Rittgers, Brandon M.
Issue Date
2022-06-22
Keyword(s)
Mini-symposium: Spectroscopy meets Chemical Dynamics
Abstract
Carbon cluster cations are generated in the gas phase by laser vaporization of a carbon rod in a pulsed supersonic expansion. C$_{n}$$^{+}$ clusters (n = 6,7,10,11,12,15,20) are mass selected using a reflectron time-of-flight mass spectrometer and photodissociated at 355 nm. The main channel for this multiphoton dissociation process is the loss of neutral C$_{3}$, resulting in C$_{n-3}$$^{+}$ cation fragments. The cationic fragments are reaccelerated into an imaging flight tube with velocity-map imaging grids and detected with an imaging detector. Significant kinetic energy release (KER) is observed for all of these cations, but with much greater KER values detected for the larger species. Specifically, the n = 10,11,12,15 and 20 species known to have monocyclic ring structures produce much greater KER than the n = 6 and 7 species known to have linear structures. Consideration of photon energies for two- or three-photon processes, together with the KER values and estimates for ring strain energies allows investigation of the energetics of the bonding and dissociation in these systems.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Handle URL
https://hdl.handle.net/2142/116885
DOI
https://doi.org/10.15278/isms.2022.WH01
Copyright and License Information
Copyright 2022 held by the authors

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Abstracts & Presentations - 2022 International Symposium on Molecular Spectroscopy PRIMARY