Reactions of triplet excited diphenyl, p-terphenyl, naphthalene and pyrene molecules were studied in benzene solvent by measuring the triplet-triplet absorption and the delayed fluorescence arising from triplet-triplet annihilation. It was found that the triplet-triplet reaction occurs practically with a diffusion limited rate. The first order decay rate parameters of triplet molecules in 5 mmol dm-3 benzene solutions were measured around 1 x 104 s-1. In presence of Xe this rate parameter increased, which indicated a definite heavy atom effect on the triplet. The rate parameters were found in the order 105-106 mol-1 dm3 s-1.
|Number of pages||4|
|Journal||Radiation Physics and Chemistry|
|Publication status||Published - Jan 1 1990|
|Event||Second International Meeting on Pulse Investigations in Physics, Chemistry and Biology - Czerniejewo, Pol|
Duration: Sep 12 1988 → Sep 17 1988
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