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Reactive Bubbly FlowsFormation, Reactivity Tuning and Kinetic Investigations of Iron “Dioxygen” Intermediate Complexes and Derivatives in Multiphase Flow Reactions

Reactive Bubbly Flows: Formation, Reactivity Tuning and Kinetic Investigations of Iron “Dioxygen”... [A dinuclear iron complex system had been developed that is capable to activate dioxygen in the protic solvent methanol forming a peroxido complex that is stable for a few seconds at room temperature. A full kinetic analysis of this reaction could be performed using stopped-flow techniques and furthermore by applying a SuperFocus mixer. Formation of the peroxido complex could be followed either by UV/VIS absorbance or by fluorescence. A reaction kit was developed that allowed to start with an air stable iron(III) complex that could be activated by reducing it with ascorbic acid prior to the reaction with dioxygen several times without decomposition of the complex. This reaction could be furthermore observed in bubbly flow columns. However, so far, the reaction rates were not in the necessary time window to perform accurate measurements. Ligand modification allowed to increase the solubility of the starting material to such an extent that it was possible to react it in water. Unfortunately, under these conditions the peroxido complex was not detected anymore. Still, from the results of this work, it seems likely that the iron system described herein can be further optimized to make it work as an oxygenation catalyst in aqueous solutions.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Reactive Bubbly FlowsFormation, Reactivity Tuning and Kinetic Investigations of Iron “Dioxygen” Intermediate Complexes and Derivatives in Multiphase Flow Reactions

Part of the Fluid Mechanics and Its Applications Book Series (volume 128)
Editors: Schlüter, Michael; Bothe, Dieter; Herres-Pawlis, Sonja; Nieken, Ulrich
Miska, Andreas; Specht, Pascal; Lerch, Markus; Schindler, Siegfried
Reactive Bubbly Flows — Jul 30, 2021
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Publisher
Springer International Publishing
Copyright
© The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
ISBN
978-3-030-72360-6
Pages
67 –82
DOI
10.1007/978-3-030-72361-3_5
Publisher site
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Abstract

[A dinuclear iron complex system had been developed that is capable to activate dioxygen in the protic solvent methanol forming a peroxido complex that is stable for a few seconds at room temperature. A full kinetic analysis of this reaction could be performed using stopped-flow techniques and furthermore by applying a SuperFocus mixer. Formation of the peroxido complex could be followed either by UV/VIS absorbance or by fluorescence. A reaction kit was developed that allowed to start with an air stable iron(III) complex that could be activated by reducing it with ascorbic acid prior to the reaction with dioxygen several times without decomposition of the complex. This reaction could be furthermore observed in bubbly flow columns. However, so far, the reaction rates were not in the necessary time window to perform accurate measurements. Ligand modification allowed to increase the solubility of the starting material to such an extent that it was possible to react it in water. Unfortunately, under these conditions the peroxido complex was not detected anymore. Still, from the results of this work, it seems likely that the iron system described herein can be further optimized to make it work as an oxygenation catalyst in aqueous solutions.]

Published: Jul 30, 2021

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