Excited-state dynamics of 9-acetylanthracene and the isomeric aceanthrenones

Journal Article · Thu Apr 09 04:00:00 EDT 1987 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100292a005· OSTI ID:6538099

Plummer, B F; Hamon, S; Burke, III, J A

Pulse radiolysis and laser excitation were used to determine intersystem crossing quantum yields in 9-acetylanthracene (9AA) and 1-aceanthrenone (1) and 2-aceanthrenone (2). Triplet-triplet absorption spectra and molar absorptivities of the triplet states are reported for each compound. The intersystem crossing quantum yield of 9AA is 0.8 +/- 0.1 while that for 1 and 2 is 0.6 and 0.4, respectively. The lack of fluorescence in nonpolar fluid media for 9AA is a consequence of intersystem crossing and is not due to the proximity effect. The rigidity of the carbonyl group constrained into a coplanar geometry in 1 and 2 appears to enhance the proximity effect and decrease intersystem crossing.

• Research Organization: Trinity Univ., San Antonia, TX
• OSTI ID: 6538099
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:8; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500* -- Photochemistry
400600 -- Radiation Chemistry
ABSORPTION SPECTRA
ANTHRACENE
AROMATICS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CONDENSED AROMATICS
DATA
DECOMPOSITION
EFFICIENCY
EMISSION SPECTRA
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
ISOMERS
LASERS
MULTIPLETS
NEODYMIUM LASERS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
PULSE TECHNIQUES
QUANTUM EFFICIENCY
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
SOLID STATE LASERS
SPECTRA
TRIPLETS