University of Illinois Urbana-Champaign

High resolution anion photoelectron spectra of cryogenically cooled silicon carbides

Babin, Mark C.

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4714.pdf

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https://hdl.handle.net/2142/107624

Description

Title
High resolution anion photoelectron spectra of cryogenically cooled silicon carbides
Author(s)
Babin, Mark C.
Contributor(s)
  • Neumark, Daniel
  • DeWitt, Martin
Issue Date
2020-06-23
Keyword(s)
Radicals
Date of Ingest
2020-06-26T03:04:45Z
Abstract
Small silicon carbides are of particular interest to the astrochemical community given the appearance of SiC, SiC$_2$, Si$_2$C, and SiC$_3$ in the interstellar medium. Here, we report high resolution anion photoelectron spectra of cryogenically cooled SiC$_3^{-}$, Si$_2$C$_2^{-}$, and Si$_3$C$^-$, providing new insight into the geometric and vibronic structure of the corresponding neutral radicals. Comparison to theory suggests the anionic ground states for all three species are ring structures, with the ground state of Si$_2$C$_2^-$ being a distorted rhombic structure possessing a dipole moment. Detachment from these anions yield vibrational frequencies for the three neutral ring structures, with a number of Franck-Condon forbidden transitions being ascribed to Herzberg-Teller coupling to excited neutral states.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
Text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/107624
Copyright and License Information
Copyright 2020 is held by the Author(s)

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Abstracts & Presentations - 2020 International Symposium on Molecular Spectroscopy PRIMARY