COMPARISON OF HIGH-ENERGY AND ULTRAVIOLET-RADIATION INDUCED LUMINESCENCE IN LIQUID SYSTEMS

Journal Article · Sun Nov 01 04:00:00 EST 1959 · Journal of Chemical Physics (U.S.)

DOI:https://doi.org/10.1063/1.1730572· OSTI ID:4222965

Lipsky, S; Burton, M

Luminescence induced by Co/sub 60/ gamma excitation of some organic solvent-solute pairs has been compared with 2537 A excitation as to dependence of intensity on solute concentration and on concentration of an added quencher. The solutions studied were 1.6-diphenylhexatriene in benzene, p-terphenyl in benzene. and pterphenyl in toluene. The quencher was bromobenzene. The energy-transfer parameter Q of the Kallmann-Furst theory and the quenching constant were obtained for each of the systems. Within an estimated experimental error of about 5%, Q was unaffected by change in source of excitation. The efficiency of quenching was found to be greater for Co/sup 60/-gainma than for u-v excitation for the two systems involving p-terphenyl. With diphenylhexatriene as solute, however, the quenching constant was unchanged. These results argue against a mechanism of energy exchange involving charge transfer. The high rates of transfer and quenching are consistent with a picture of the solvent involving the existence of small ordered regions within which exciton transfer can occur so that the entire region is viable to attack by a foreign molecule with resultant quenching or energy transfer. (auth)

• Research Organization: Univ. of Notre Dame, Ind.
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-003539
• OSTI ID: 4222965
• Journal Information: Journal of Chemical Physics (U.S.), Journal Name: Journal of Chemical Physics (U.S.) Vol. Vol: 31; ISSN JCPSA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BENZENE
CHEMISTRY
COBALT 60
COOLING
EXCITATION
GAMMA RADIATION
ISOMERS
LUMINESCENCE
ORGANIC COMPOUNDS
POLYPHENYLS
RADIATION EFFECTS
TERPHENYL-PARA
TOLUENE
ULTRAVIOLET RADIATION