Manganese catalysed reduction of dioxygen to hydrogen peroxide: structural studies on a manganese(III)–catecholate complex

Hydrogen Peroxide Synthesis: An Outlook beyond the Anthraquinone Process

“…[248] There is evidence that hydroxylamine is highly effective at reducing the Mn III/IV centers in Mn-containing catalase enzymes to Mn II 2 centers. The corresponding Mn II complexes act as the active catalysts.…”

Origins of Catalyst Inhibition in the Manganese‐Catalysed Oxidation of Lignin Model Compounds with H2O2

“…The bands at 1264 and 1474 cm −1 are characteristic of the catecholate C−O stretching modes, and the absorbance at 600 nm is typical of LMCT (ligand‐to‐metal charge transfer) bands of Mn IV catecholate species. The absorbance reached (≈0.45, Figure b) is consistent with the molar absorptivity of [Mn IV (catecholato) 3 ] 2− (4500 m −1 cm −1 ) . These data indicate that in the first 2–3 minutes of the reaction the deep blue [Mn IV (catecholato) 3 ] 2− was formed.…”

Hydrothermal synthesis, crystal structures and properties of Tiron-bridged di- and trinuclear strontium complexes containing nitrogen-donor ligands

“…However, in the process of construction of metal-sulfonates, the disulfonated catechol ligands are unusually used as the building blocks [23]. Na 2 H 2 Tiron can be selected as a bridging and chelating ligand, due to its following characteristics: (a) the ligand containing disulfonate and catechol groups have been less explored; (b) the direct combination of the functional groups with a rigid benzene ring can more easily promote the coordination reaction to form novel structures; (c) the relationship between the phenol group and sulfonate group is the ortho, meta and para positions of a benzene ring, which can exhibit rich coordination modes via their potential oxygen donors.…”

“…Na 2 H 2 Tiron can be selected as a bridging and chelating ligand, due to its following characteristics: (a) the ligand containing disulfonate and catechol groups have been less explored; (b) the direct combination of the functional groups with a rigid benzene ring can more easily promote the coordination reaction to form novel structures; (c) the relationship between the phenol group and sulfonate group is the ortho, meta and para positions of a benzene ring, which can exhibit rich coordination modes via their potential oxygen donors. Five types of coordination modes of Tiron have been structurally characterized so far [5,[23][24][25][26]. The coordination versatility, together with the coordination requirements of specific metal ions, allowed for the construction of different architectures.…”