Proximity effect and excited-state dynamics of 9-carbonyl-substituted anthracenes

Journal Article · Wed Mar 06 04:00:00 EST 1985 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00291a008· OSTI ID:5528718

Lai, T I; Lim, E C

It is shown that 9-carbonyl-substituted anthracenes exhibit photophysical properties that are characteristic of the proximity effect. Measurements are presented of the temperature and solvent dependence of fluorescence and triplet formation for several 9-carbonyl-substituted anthracenes. The results demonstrate that the proximity effect is an important factor in determining the photophysical properties of these compounds, especially at elevated temperature. For large S/sub 2/(n..pi..*)-S/sub 1/(..pi pi..*) gaps and at low temperatures, where the proximity effect becomes much less important, the disposition of an n..pi..* triplet state relative to S/sub 1/(..pi pi..*) appears to have an important influence on the photophysics of these molecules, consistent with a manifestation of the selection rule for intersystem crossing. 19 references, 8 figures, 1 table.

• Research Organization: Wayne State Univ., Detroit, MI
• OSTI ID: 5528718
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Journal Issue: 5 Vol. 107:5; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400500* -- Photochemistry
ANTHRACENE
AROMATICS
CARBONYL RADICALS
CONDENSED AROMATICS
COUPLING
DATA
DE-EXCITATION
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
FLUORESCENCE
HYDROCARBONS
INFORMATION
LIFETIME
LOW TEMPERATURE
LUMINESCENCE
MEDIUM TEMPERATURE
MOLECULAR STRUCTURE
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIATIONLESS DECAY
RADICALS
STRUCTURAL CHEMICAL ANALYSIS
TEMPERATURE DEPENDENCE