Threshold photoelectron spectroscopy of acetaldehyde and acrolein

•High-resolution threshold photoelectron spectrum of acetaldehyde.•High-resolution threshold photoelectron spectrum of acrolein.•High-resolution total photoion yield spectrum of acetaldehyde.•High-resolution total photoion yield spectrum of acrolein.•Determination of vertical ionization potentials i...

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Bibliographic Details
Published in:Journal of electron spectroscopy and related phenomena 2013-04, Vol.187, p.65-71
Main Authors: Yencha, Andrew J., Siggel-King, Michele R.F., King, George C., Malins, Andrew E.R., Eypper, Marie
Format: Article
Language:English
Subjects:
Acetaldehyde
Acrolein
Acroleins
Autoionization
Band spectra
Band structure of solids
Ionization potentials
Photoelectrons
Rydberg states
Spectra
Thermoplastic elastomers
Threshold photoelectron spectroscopy
Thresholds
Total photoion yield spectroscopy
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Summary:•High-resolution threshold photoelectron spectrum of acetaldehyde.•High-resolution threshold photoelectron spectrum of acrolein.•High-resolution total photoion yield spectrum of acetaldehyde.•High-resolution total photoion yield spectrum of acrolein.•Determination of vertical ionization potentials in acetaldehyde and acrolein. High-resolution (6meV and 12meV) threshold photoelectron (TPE) spectra of acetaldehyde and acrolein (2-propenal) have been recorded over the valence binding energy region 10–20eV, employing synchrotron radiation and a penetrating-field electron spectrometer. These TPE spectra are presented here for the first time. All of the band structures observed in the TPE spectra replicate those found in their conventional HeI photoelectron (PE) spectra. However, the relative band intensities are found to be dramatically different in the two types of spectra that are attributed to the different dominant operative formation mechanisms. In addition, some band shapes and their vertical ionization potentials are found to differ in the two types of spectra that are associated with the autoionization of Rydberg states in the two molecules.
ISSN:0368-2048
1873-2526
DOI:10.1016/j.elspec.2013.04.005