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Laser induced fluorescence and phosphorescence of matrix isolated glyoxal - Evidence for exciplex formation in the A 1Au and a 3Au statesLaser-induced fluorescence and phosphorescence as well as infrared and visible absorption spectra of glyoxal in Ar, N2, and CO matrices are presented and analyzed. Glyoxal in its first excited electronic state is shown to form an exciplex with its nearest neighbors in all three matrices, and transitions normally forbidden dominate the emission spectra. The spectral characteristics of these complexes are similar to those of the Ar-glyoxal complex found in supersonic beam experiments. Due to the matrix cage effect, no vibrational predissociation is observed. The phosphorescence lifetime is determined and an upper limit is given for the fluorescence lifetime. This, in combination with the relative intensities of fluorescence and phosphorescence, can be used to place limits on the quantum yields of the various relaxation processes.
Document ID
19870022827
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Van Ijzendoorn, L. J.
(Huygens Lab. Leiden, Netherlands)
Baas, F.
(Huygens Lab. Leiden, Netherlands)
Koernig, S.
(Huygens Lab. Leiden, Netherlands)
Greenberg, J. M.
(Leiden Rijksuniversiteit, Sterrewacht, Netherlands)
Allamandola, L. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 13, 2013
Publication Date
August 15, 1986
Publication Information
Publication: Journal of Chemical Physics
Volume: 85
ISSN: 0021-9606
Subject Category
Inorganic And Physical Chemistry
Accession Number
87A10101
Distribution Limits
Public
Copyright
Other

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