Journal of Physical Chemistry p. 2460 - 2464 (1985)
Update date:2022-08-11
Topics:
Slama-Schwok, Anny
Gershuni, Shlomo
Rabani, Joseph
Cohen, Haim
Meyerstein, Dan
An iridium(III)-bipyridine complex, (Ir(C3,N'-bpy)(bpy)2)(2+), was used as a photosensitizer in aqueous bromide solutions.Steady-state photolysis of oxygenated solutions by near-ultraviolet and visible light produces equal concentrations of Br3(-) and H2O2.The quantum yield of Br3(-) equivalents depends on pH, illumination dose, and bromide concentration.The initial yield (extrapolated) reaches a value of 0.08.A mechanism involving two exciplexes and the transients Br2(-.) and HO2 is proposed, based on products analysis, steady-state emission, and pulsed laser experiments.
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