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Chemiluminescent reaction of sulphite auto‐oxidation in the presence of Ni(II)/tetraglycine and ruthenium(II)/bipy complexes: mechanistic considerations
Author(s) -
Bonifácio Rodrigo Leandro,
Coichev Nina
Publication year - 2005
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.868
Subject(s) - chemistry , chemiluminescence , ruthenium , redox , oxygen , inorganic chemistry , photochemistry , reaction mechanism , catalysis , organic chemistry
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 [Ru II (bipy) 3 ] 2+ ions. The Ni(III) complex oxidizes SO 3 2− to SO 3 •− , reacts with oxygen to produce SO 5 •− , 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 SO 3 2− and oxygen concentrations. The emission intensity depends on the concentrations of SO 3 2− , Ni(II) and Ru(II) complexes. Copyright © 2005 John Wiley & Sons, Ltd.