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- W2077500859 abstract "The ligand-substitution reaction of the bromopentaamminecobalt(III) ion, [CoBr(NH3)5]2+, with ethylenediaminetetraacetate (EDTA) (which denotes all the forms of EDTA, i.e. edta4−, Hedta—, H2edta2− etc.) was induced by irradiation with visible light of aqueous solutions containing the tris(2,2′-bipyridine)ruthenium(II) ion, [Ru(bpy)3]2+. The [Co(edta)]− ion was efficiently produced in acid solutions at pH 2–3, where [Ru(bpy)3]2+ acts as an inductor and a photocatalyst. The ligand-substitution reaction constitutes a chain reaction composed of a [Ru(bpy)3]2+ and [Ru(bpy)3]3+ cycle, where the substitution reaction is initiated by the quenching reaction of the photoexcited complex [Ru(bpy)3]2+* with [CoBr(NH3)5]2+. The formation rate of [Co(edta)]− by the ligand-substitution reaction between EDTA and [CoBr(NH3)5]2+ decreased with increasing pH (pH > 3) as well as with decreasing pH (pH < 2), and was at a maximum at pH 2–3. Under conditions of pH 2–3, the photo-induced ligand-substitution reaction between EDTA and [CoBr(NH3)5]2+ was quantitative, i.e. the [[Co(edta)]−]formed/[[CoBr(NH3)5]2+]decomposed ratio = 1. Reaction mechanisms are discussed." @default.
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- W2077500859 date "1987-01-01" @default.
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- W2077500859 title "Light-induced ligand-substitution reactions—II. Reaction between the [CoBr(NH3)5]2+ ion and ethylenediaminetetraacetate by irradiation with visible light of aqueous acid solution containing the tris(2,2′-bipyridine)ruthenium(II) ion" @default.
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- W2077500859 doi "https://doi.org/10.1016/s0277-5387(00)80842-6" @default.
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