An iridium-bipyridine complex as a photosensitizer for the bromide oxidation to bromine by oxygen

Anny Slama-Schwok; Shlomo Gershuni; Joseph Rabani; Haim Cohen; Dan Meyerstein

doi:10.1021/j100258a007

An iridium-bipyridine complex as a photosensitizer for the bromide oxidation to bromine by oxygen

Anny Slama-Schwok, Shlomo Gershuni, Joseph Rabani, Haim Cohen, Dan Meyerstein

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

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Abstract

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.

Original language	English
Pages (from-to)	2460-2464
Number of pages	5
Journal	Journal of Physical Chemistry
Volume	89
Issue number	12
DOIs	https://doi.org/10.1021/j100258a007
State	Published - 1 Jan 1985

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General Engineering
Physical and Theoretical Chemistry

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title = "An iridium-bipyridine complex as a photosensitizer for the bromide oxidation to bromine by oxygen",

abstract = "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.",

author = "Anny Slama-Schwok and Shlomo Gershuni and Joseph Rabani and Haim Cohen and Dan Meyerstein",

year = "1985",

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T1 - An iridium-bipyridine complex as a photosensitizer for the bromide oxidation to bromine by oxygen

AU - Slama-Schwok, Anny

AU - Gershuni, Shlomo

AU - Rabani, Joseph

AU - Cohen, Haim

AU - Meyerstein, Dan

PY - 1985/1/1

Y1 - 1985/1/1

N2 - 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.

AB - 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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JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 12

ER -

An iridium-bipyridine complex as a photosensitizer for the bromide oxidation to bromine by oxygen

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