Abstract
Chemiluminescence activated by the chelates Eu(tta)3phen and Eu(dbm)3phen in the thermal decomposition of diphenyldiazomethane in benzene in the presence of oxygen was examined at 333 K. The following photophysical characteristics of the luminescence emitter, excited triplet benzophenone (BP), were found: the phosphorescence quantum yield ϕ BP 0 = 1.0 × 10−5, the true lifetime τ BP 0 = 7 × 10−8 s, and the rate constant of radiative deactivationk r, BP = ϕ BP 0 τ BP 0 −1 = 160 s−1.
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