PES Database

About this Database

This database contains valence photoelectron spectra of neutral organic, inorganic, and organometallic molecules in the gas phase.  This is a work in progress that currently only contains a few entries that will (hopefully) expand as time allows.  The purpose of this database is to present photoelectron data in the format of spectral plots and data files.  Several other databases that provide tables of ionization energies are listed below.

Database Contents - unavailable


Using the Database

To view the contents of the database click the button "Database Contents" located at the top and bottom of this page.  The page lists the spectra currently in the database sorted by type of molecule.  To see more information on any entry click the name of the molecule.  The details page contains links to jpg images of spectral plots and to txt files containing x,y data in the format used by the program WinFp.

Experimental Details

All of the spectra in the database at this time were collected using the instrumentation in the Center for Gas-Phase Electron Spectroscopy at The University of Arizona.  Most data were collected with a He(I) discharge source, although some of the spectra shown were collected with the He(II) line so that ionizations above 20 eV could be shown.  The typical resolution during data collection is 0.01-0.02 eV.  The energy scale is calibrated to a precision of better than 0.02 eV.

Other Online Compilations of Photoelectron Spectra and Ionization Energies

The NIST Chemistry WebBook contains ion thermochemistry data, including ionization energies.  The data presented here is derived from a variety of methods, including photoelectron spectroscopy.  Ionization energies are given in tabular format with extensive references.

The NIST XPS Database contains ionizations energies measured by solid-state XPS in tabular format with extensive references.

Database of Molecular Photoelectron Spectra by Leif Karlsson at the Department of Physics at Uppsala University.

The ZEKE Database by Edward Schlag at the Institute for Physical and Theoretical Chemistry, Technical University of Munich lists high precision ionization energies determined by ZEKE.

The Online Photoelectron Image Library by the Sanov Group at The University of Arizona contains data from photoelectron imaging of negative ions.