The Genuine Article Number: XQ566
Schiedt J. Weinkauf R .
PHOTODETACHMENT PHOTOELECTRON SPECTROSCOPY OF PERYLENE AND
CS2 - TWO EXTREME CASES
Chemical Physics Letters. 274(1-3):18-22, 1997 Aug 1.
Jet-cooled perylene. Molecules.
Photodetachment photoelectron spectroscopy has been applied to the
investigation of mass selected and supersonic jet cooled perylene and CS2
anions, used as model systems for large and small molecules, Far perylene,
the adiabatic electron affinity is determined to be 973 +/- 5 meV. In contrast,
despite a resolved bending mode progression in the neutral ground state,
only an upper limit of 800 meV can be given for the adiabatic electron affinity
of CS2. This is due to poor Franck-Condon overlap between the bent anionic
and the linear neutral molecular structures. The vibrational intensity
distributions in the spectra of CS2 and perylene can be taken as prototypes
for small and large molecules: the different affects of the surplus electron in
either a localized or delocalized pi* orbital on geometry can be generalized.
The spectra are the first anion photodetachment photoelectron spectra of
these molecules. (C) 1997 Elsevier Science B.V. [References: 25]
Physical chemistry/chemical physics.
Current Contents/Physical, Chemical & Earth Sciences
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