Energy transfer in the /sup 1/A/sub u/ state of glyoxal. III. Deuterium effects

Journal Article · Fri Apr 01 04:00:00 EST 1977 · J. Chem. Phys.; (United States)

OSTI ID:7313041

Zittel, P F; Lineberger, W C

Collision-free lifetimes and collisional quenching rate constants are reported for a number of single vibrational levels of glyoxal-d/sub 2/ (/sup 1/A/sub u/) and glyoxal-hd (/sup 1/A'') and are compared with previous results for glyoxal-h/sub 2/. There was some success in correlating the dependences of collision-free decay rates on specific vibrational level and on isotopic substitution with the predictions of intramolecular, nonradiative decay theory. There are strong isotope effects on the collision-free lifetimes, but the rate constants for collision depopulation of a vibronic level, which increase sharply with energy in the excited state, are strikingly isotope independent. The increase is believed to be primarily a result of increased intersystem crossing rate and is compared with a mixed state model proposed by Freed.

• Research Organization: Department of Chemistry, University of Colorado
• OSTI ID: 7313041
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 66:7; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
ALDEHYDES
DEUTERIUM
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
GLYOXAL
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
STABLE ISOTOPES
VIBRATIONAL STATES