title: The role of carboxylato ligand dissociation in the oxidation of chrysin with H₂O₂ catalysed by [Mn₂(III,IV)(μ-CH₃COO)(μ-O)₂(Me₄dtne)](PF₆)₂.
abstract: The aqueous and non-aqueous chemistry of the complex [Mn2(III,IV)(μ-CH3COO)(μ-O)2(Me4dtne)](PF6)2 (where Me4dtne = 1,2-bis(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)ethane), which has been demonstrated as an exceptionally active catalyst in the bleaching of raw cotton and especially wood pulp at high pH (>11), is explored by UV/vis absorption, Raman and EPR spectroscopies and cyclic voltammetry. The data indicate that dissociation of the μ-acetato bridge is essential to the catalyst activity and rationalises the effect of sequestrants such as DTPA on its performance.
authors.affiliation: Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands. w.r.browne@rug.nl.
authors.forename: Shaghayegh
authors.initials: S
authors.lastname: Abdolahzadeh
authors.forename: Nicola M
authors.initials: NM
authors.lastname: Boyle
authors.forename: M Lisa
authors.initials: ML
authors.lastname: Hoogendijk
authors.forename: Ronald
authors.initials: R
authors.lastname: Hage
authors.forename: Johannes W
authors.initials: JW
authors.lastname: de Boer
authors.forename: Wesley R
authors.initials: WR
authors.lastname: Browne
mesh_terms: D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008024:Ligands; D008345:Manganese / Q000737:chemistry*; D010084:Oxidation-Reduction; D014867:Water / Q000737:chemistry
chemical_list: D056831:Coordination Complexes; D005419:Flavonoids; D008024:Ligands; D014867:Water; C043561:chrysin; D008345:Manganese; D006861:Hydrogen Peroxide