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.

Selective conversion of aldehydes to carboxylic acids by hemoglobin and air

2018 ◽  
Vol 22 (08) ◽  
pp. 679-685 ◽  
Author(s):  
Mahdi Hajimohammadi ◽  
Maryam Khalaji Verjani ◽  
Hoda Ghasemi ◽  
Nasser Safari ◽  
Günther Knör
Keyword(s):  
Carboxylic Acids ◽  
Mass Spectroscopy ◽  
Room Temperature ◽  
Aqueous Media ◽  
Water Soluble ◽  
Feasible Method ◽  
Vis Spectroscopy ◽  
Major Route ◽  
High Valent

A new green, environmentally friendly and economically feasible method for the oxygenation of benzaldehyde, cinnamaldehyde, 4-chlorobenzaldehyde and 4-bromobenzaldehyde to the corresponding carboxylic acids using air in the presence of hemoglobin as a water-soluble catalyst in aqueous media at room temperature is illustrated. The resulting products were obtained with (77–100%) conversion and 100% selectivity within a reasonable amount of time. In addition, the first direct characterization of a high-valent iron intermediate (HbFe[Formula: see text]O) measured using Mass Spectroscopy (MS) and UV-vis spectroscopy proved that the major route for oxidation of aldehydes is (HbFe[Formula: see text]O) production.

Decoloration of Azo Dyes by Hydrogen Peroxide Catalyzed by Water-Soluble Manganese Porphyrins

1999 ◽  
Vol 69 (12) ◽  
pp. 956-960 ◽  
Author(s):  
J. Tokuda ◽  
R. Ohura ◽  
T. Iwasaki ◽  
Y. Takeuchi ◽  
A. Kashiwada ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Azo Dyes ◽  
Water Soluble ◽  
Manganese Porphyrins

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

Preparation and Application as Biosensor of Water-Soluble Conjugated Polyelectrolyte

2013 ◽  
Vol 538 ◽  
pp. 301-304
Author(s):  
Yi Ping Zhong ◽  
Rui Bin Hong ◽  
Bin Bin Yin ◽  
Ping Liu ◽  
Wen Ji Deng
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Water Soluble ◽  
Conjugated Polyelectrolyte ◽  
Sodium Sulfonate ◽  
Vis Spectroscopy

The water-soluble conjugated polyelectrolyte, poly[3-(1′-propyloxy-3′-sodium sulfonate) thiophene] (PTH-n3-SO3Na), was prepared. The interaction between the PTH-n3-SO3Na and bovine serum albumin (BSA) was investigated using UV-vis spectroscopy. It was found that the PTH-n3-SO3Na could be used as biosensor to detect BSA.

Visible photostability of some ruthenium and platinum phthalocyanines in water and in the presence of organic substrates

2010 ◽  
Vol 14 (06) ◽  
pp. 499-508 ◽  
Author(s):  
Manuela Carchesio ◽  
Lucia Tonucci ◽  
Nicola d'Alessandro ◽  
Antonino Morvillo ◽  
Piero Del Boccio ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbonyl Compounds ◽  
Furfuryl Alcohol ◽  
Phenylacetic Acid ◽  
Water Soluble ◽  
Light Irradiation ◽  
Organic Substrates ◽  
Visible Spectra ◽  
Trapping Agent

Water-soluble, metal-tetrasubstituted phthalocyanines ( -SO3H , MPcS and -COOH , MPcC) of platinum and ruthenium were synthesized and their photostability to visible light irradiation was determined. For the ruthenium phthalocyanines, the characteristic visible Q band of the phthalocyanines was almost totally suppressed after five days of irradiation. The platinum derivatives were instead more resistant to photodegradation, and the Q band did not decrease by more than 25%. The addition of carbonyl compounds to the phthalocyanine solution in water (at concentrations at least 1400-fold those of the phthalocyanines) dramatically accelerated the photobleaching of these phthalocyanine complexes. PtPcS turned from blue to green and to colorless with one day of visible-light irradiation in the presence of acetone. This effect decreased with the increase in molecular weight of the ketones (from acetone to 2-pentanone). The addition of alcohols (i.e. 1-butanol) or other organics (i.e. phenylacetic acid) did not affect the photostability of these metal-tetrasubstituted phthalocyanines. Dioxygen also had an important role, as when the solutions of phthalocyanines were carefully deaerated before irradiation, the visible spectra were preserved. The platinum phthalocyanines, as with the palladium analogs, sensitize the photoproduction of 1O2 , as shown by the formation of endoperoxide and its rearranged products in the presence of furfuryl alcohol (a singlet oxygen trapping agent).

Facile synthesis of water-soluble graphene-based composite: Non-covalently functionalized with chitosan-ionic liquid conjugation

2016 ◽  
Vol 09 (03) ◽  
pp. 1650045 ◽  
Author(s):  
Pei-Ying Li ◽  
Kai-Yu Cheng ◽  
Xiu-Cheng Zheng ◽  
Pu Liu ◽  
Xiu-Juan Xu
Keyword(s):  
Electron Microscopy ◽  
Ionic Liquid ◽  
Chemical Reduction ◽  
Water Soluble ◽  
X Ray Diffraction ◽  
Facile Synthesis ◽  
X Ray ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Text Interaction

Chitosan-ionic liquid conjugation (CILC), which was prepared through the reaction of 1-(4-bromobutyl)-3-methylimidazolium bromide (BBMIB) with chitosan, was firstly used to prepare functionalized graphene composite via the chemical reduction of graphene oxide (GO). The obtained water soluble graphene-based composite was characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible (UV–Vis) spectroscopy and so on. CILC-RGO showed excellent dispersion stability in water at the concentration of 2.0 mg/mL, which was stable for several months without any precipitate. This may be ascribed to the electrostatic attraction and [Formula: see text]–[Formula: see text] interaction between CILC and graphene.

scholarly journals Screening of different interactions in oxo-manganese porphyrin dimers containing axial N-donor ligands: a theoretical study

RSC Advances ◽  
2018 ◽  
Vol 8 (18) ◽  
pp. 9770-9774 ◽  
Author(s):  
Hossein Kavousi ◽  
Abdolreza Rezaeifard ◽  
Heidar Raeisi ◽  
Maasoumeh Jafarpour
Keyword(s):  
Theoretical Study ◽  
Donor Ligands ◽  
Manganese Porphyrin ◽  
High Valent ◽  
Porphyrin Dimers

A DFT analysis for describing the dimeric assemblies of high-valent manganese(v)-oxo meso-tetraphenylporphyrin ([(TPP)MnVO]22+) and meso-tetrakis(pentafluorophenyl)porphyrin ([(TPFPP)MnVO]22+) in the presence of axial N-donor ligands is presented.

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