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Issue 17, 2014
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The role of carboxylato ligand dissociation in the oxidation of chrysin with H2O2 catalysed by [Mn2III,IV(μ-CH3COO)(μ-O)2(Me4dtne)](PF6)2

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Abstract

The aqueous and non-aqueous chemistry of the complex [Mn2III,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.

Graphical abstract: The role of carboxylato ligand dissociation in the oxidation of chrysin with H2O2 catalysed by [Mn2III,IV(μ-CH3COO)(μ-O)2(Me4dtne)](PF6)2

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Publication details

The article was received on 10 Nov 2013, accepted on 13 Feb 2014 and first published on 14 Feb 2014


Article type: Paper
DOI: 10.1039/C3DT53174K
Citation: Dalton Trans., 2014,43, 6322-6332
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    The role of carboxylato ligand dissociation in the oxidation of chrysin with H2O2 catalysed by [Mn2III,IV(μ-CH3COO)(μ-O)2(Me4dtne)](PF6)2

    S. Abdolahzadeh, N. M. Boyle, M. L. Hoogendijk, R. Hage, J. W. de Boer and W. R. Browne, Dalton Trans., 2014, 43, 6322
    DOI: 10.1039/C3DT53174K

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