title: Calmagite dye oxidation using in situ generated hydrogen peroxide catalysed by manganese(II) ions.
abstract: Hydrogen peroxide (H(2)O(2)) generated from the manganese(II) catalysed reduction of dioxygen has been shown to efficiently oxidize Calmagite (3-hydroxy-4-(2-hydroxy-5-methylphenylazo)naphthalene-1-sulfonic acid) in aqueous solution at pH 8.0 and 20 +/- 1 degrees C with de-protonated Tiron (1,2-dihydroxybenzene-3,5-disulfonate, disodium salt) acting as an essential co-ligand.
authors.affiliation: Inorganic Chemistry Research Laboratories, School of Biological and Chemical Sciences, Queen Mary, University of London, London, UK E1 4NS. t.s.sheriff@qmul.ac.uk
authors.forename: Tippu S
authors.initials: TS
authors.lastname: Sheriff
authors.forename: Steven
authors.initials: S
authors.lastname: Cope
authors.forename: Mmaezi
authors.initials: M
authors.lastname: Ekwegh
mesh_terms: D014013:1,2-Dihydroxybenzene-3,5-Disulfonic Acid Disodium Salt / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000138:chemical synthesis* / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D008024:Ligands; D008345:Manganese / Q000737:chemistry*; D015394:Molecular Structure; D010084:Oxidation-Reduction; D012996:Solutions / Q000737:chemistry; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D007477:Ions; D008024:Ligands; D012996:Solutions; D014867:Water; C006876:calmagite; D008345:Manganese; D014013:1,2-Dihydroxybenzene-3,5-Disulfonic Acid Disodium Salt; D006861:Hydrogen Peroxide