title: A two-intermediate model for imidazole-promoted peroxyoxalate chemiluminescence.
abstract: A mechanism is proposed for imidazole-catalysed peroxyoxalate chemiluminescence. The reaction model includes a sequential formation of 1-aroxalylimidazole and 1,1'-oxalyldiimidazole as light-producing reaction intermediates. The suggestion is supported by the kinetic data obtained for the reaction of imidazole with bis(4-nitrophenyl) oxalate and on the recently reported ability of 1,1'-oxalyldiimidazole to function as an efficient chemiluminescence reagent. The relative contributions of different catalytic pathways and hydrolytic side-reactions are discussed.
authors.affiliation: Department of Chemistry, University of Turku, Finland.
authors.forename: H
authors.initials: H
authors.lastname: Neuvonen
mesh_terms: D002384:Catalysis; D006868:Hydrolysis; D007093:Imidazoles / Q000737:chemistry*; D007202:Indicators and Reagents; D008163:Luminescent Measurements; D008956:Models, Chemical; D010070:Oxalates / Q000737:chemistry*; D013329:Structure-Activity Relationship
chemical_list: C554599:1,1'-oxalyldiimidazole; D007093:Imidazoles; D007202:Indicators and Reagents; D010070:Oxalates; C044622:peroxyoxalate; C029899:imidazole