Selective electrocatalysis of olefins by a water-soluble manganese porphyrin in acidic solution

1994 ◽  
pp. 971 ◽  
Author(s):  
Mao-Huang Liu ◽  
Y. Oliver Su
Keyword(s):  
Acidic Solution ◽  
Water Soluble ◽  
Manganese Porphyrin

Chlorite Dismutation to Chlorine Dioxide Catalyzed by a Water-Soluble Manganese Porphyrin

2010 ◽  
Vol 50 (3) ◽  
pp. 699-702 ◽  
Author(s):  
Scott D. Hicks ◽  
Jennifer L. Petersen ◽  
Curt J. Bougher ◽  
Mahdi M. Abu-Omar
Keyword(s):  
Chlorine Dioxide ◽  
Water Soluble ◽  
Manganese Porphyrin

Mechanistic study of a manganese porphyrin catalyst for on-demand production of chlorine dioxide in water

2015 ◽  
Vol 19 (01-03) ◽  
pp. 492-499 ◽  
Author(s):  
Scott D. Hicks ◽  
Silei Xiong ◽  
Curt J. Bougher ◽  
Grigori A. Medvedev ◽  
James Caruthers ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Chlorine Dioxide ◽  
Transfer Reaction ◽  
Water Soluble ◽  
Reaction Pathways ◽  
Mechanistic Study ◽  
Manganese Porphyrin ◽  
Oxygen Atom Transfer ◽  
On Demand ◽  
Proton Coupled Electron Transfer

A water-soluble manganese porphyrin complex was examined for the catalytic formation of chlorine dioxide from chlorite under ambient temperature at pH 5.00 and 6.90. Quantitative kinetic modeling allowed for the deduction of a mechanism that accounts for all experimental observations. Catalysis is initiated via an OAT (Oxygen Atom Transfer) reaction resulting in formation of a putative manganese(V) oxo species, which undergoes ET (Electron Transfer) with chlorite to form chlorine dioxide. As chlorine dioxide accumulates in solution, chlorite consumption slows down and ClO 2 reaches a maximum as the system reaches equilibrium. In phosphate buffer at pH 6.90, manganese(IV) oxo accumulates and its reaction with ClO 2 gives ClO 3-. However, at pH 5.00 acetate buffer proton coupled electron transfer (PCET) from chlorite to manganese(IV) oxo is fast and irreversible leading to chlorate formation only via the putative manganese(V) oxo species. These differences underscore how PCET rates affect reaction pathways and mechanism. The ClO 2 product can be collected from the aqueous reaction mixture via purging with an inert gas, allowing for the preparation of chlorine dioxide on-demand.

Potassium monopersulfate and a water-soluble manganese porphyrin complex, [Mn(TMPyP)](OAc)5, as an efficient reagent for the oxidative cleavage of DNA

Biochemistry ◽  
1989 ◽  
Vol 28 (18) ◽  
pp. 7268-7275 ◽  
Author(s):  
Jean Bernadou ◽  
Genevieve Pratviel ◽  
Faiza Bennis ◽  
Marc Girardet ◽  
Bernard Meunier
Keyword(s):  
Oxidative Cleavage ◽  
Water Soluble ◽  
Manganese Porphyrin ◽  
Porphyrin Complex ◽  
Efficient Reagent

Treatment of Model Wastewater Including Eriochrome Black T Based on Eggshell Membrane

2011 ◽  
Vol 183-185 ◽  
pp. 2120-2123 ◽  
Author(s):  
Tao Liu
Keyword(s):  
Azo Dye ◽  
Acidic Solution ◽  
Ph Value ◽  
Dye Adsorption ◽  
Water Soluble ◽  
Eggshell Membrane ◽  
Dye Wastewater ◽  
Optimum Conditions ◽  
Eriochrome Black T ◽  
Pollution Problem

The adsorption and decolorization of water-soluble azo dye(Eriochrome Black T) was investigated based on eggshell membrane. The effect of adsorption time, pH value, temperature as well as the dosage of eggshell membrane on the decolorization of Eriochrome Black T was studied. It is indicated from the experimental results that the azo-dye adsorption with eggshell membrane should be carried out in acidic solution. At the optimum conditions, 95% of Eriochrome Black T could be removed. In this study, the dumped eggshell membrane can be utilized to solve the pollution problem of dye wastewater, which will offer us a new way for utilization of eggshell membrane and treatment of wastewater.

Efficient Oxidative Degradation of Azo Dyes by a Water-Soluble Manganese Porphyrin Catalyst

ChemCatChem ◽  
2013 ◽  
Vol 5 (3) ◽  
pp. 796-805 ◽  
Author(s):  
Tapan Kumar Saha ◽  
Holm Frauendorf ◽  
Michael John ◽  
Sebastian Dechert ◽  
Franc Meyer
Keyword(s):  
Azo Dyes ◽  
Oxidative Degradation ◽  
Water Soluble ◽  
Manganese Porphyrin

Biomimetic models of nitric oxide synthase for the oxidation of oximes to carbonyl compounds catalyzed by water-soluble manganese porphyrins in aqueous solution

2011 ◽  
Vol 15 (03) ◽  
pp. 211-216 ◽  
Author(s):  
Qing-Gang Ren ◽  
Xian-Tai Zhou ◽  
Hong-Bing Ji
Keyword(s):  
Carbonyl Compounds ◽  
Water Soluble ◽  
Ambient Conditions ◽  
Manganese Porphyrin ◽  
Manganese Porphyrins ◽  
Vis Spectroscopy ◽  
Excellent Activity ◽  
High Valent ◽  
Manganese Species ◽  
Oxide Synthase

A mild green and efficient approach for hydrogen peroxide oxidative converting oximes to the corresponding carbonyl compounds with a water-soluble manganese porphyrin as catalyst in water/acetone mixture has been developed. The water-soluble manganese porphyrin showed an excellent activity for the oxidative deoximation reactions of various oximes under ambient conditions in the absence of any additive. The oxidative deoximation was through the formation of high valent oxo-manganese species, which was confirmed by in situ UV-vis spectroscopy.

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