Luminescence 2005-01-01

Chemiluminescent reaction of sulphite auto-oxidation in the presence of Ni(II)/tetraglycine and ruthenium(II)/bipy complexes: mechanistic considerations.

Rodrigo Leandro Bonifácio, Nina Coichev

Index: Luminescence 20(6) , 428-34, (2005)

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Abstract

The present work is a mechanistic study of the possible analytical chemiluminescent reaction of sulphite oxidation in the presence of dissolved oxygen, Ni(II)/tetraglycine and [RuII(bipy)3]2+ ions. The Ni(III) complex oxidizes SO32- to SO3-, reacts with oxygen to produce SO5-, initiating a radical chain reaction. The strong oxidants generated oxidize Ni(II) and Ru(II) complexes in one redox cycle, which is related to the balance of SO32- and oxygen concentrations. The emission intensity depends on the concentrations of SO32-, Ni(II) and Ru(II) complexes.(c) 2005 John Wiley & Sons, Ltd.

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