Bio-inspired oxidation of methane in water catalyzed by N-bridged diiron phthalocyanine complex

Sorokin, Alexander B. Kudrik, Evgeny V. Bouchu, DenisA stable mu-nitrido diiron phthalocyanine activates H2O2 to oxidize CH4 in water at 25-60 degrees C to methanol, formaldehyde and formic acid as evidenced using C-13 and O-18 labelling

Concentration measurements of sucrose and sugar surfactants solutions by using the 1H NMR ERETIC method

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PGFSE-NMR study of the self diffusion of sucrose fatty acid monoesters in water

The micellization of pure monosubstituted sucrose fatty acid esters in water, namely sucrose octanoate, sucrose decanoate, sucrose laurate, sucrose dodec-5-cis-enoate, sucrose myristate, and sucrose palmitate, has been investigated by means of two NMR methods, pulsed field gradient spin-echo NMR (PFGSE–NMR), giving access to the self-diffusion coefficients of free molecules and micelles in solution, and the ERETIC method (electronic reference to access in vivo concentrations) for the measurement of concentrations by external calibration of a synthetic NMR signal. The early micellar regions and, when possible, the premicellar regions were investigated. By this method, we obtained the hydrodynamic radii of micelles, displaying a linear progression in relation to the chain length and an accurate determination of critical micellar concentration (CMC) for each sucrose ester. The effect of the regiochemistry of fatty chain grafting has been investigated, showing special behavior for -O-sucrose palmitate

Stable N-bridged diiron (IV) phthalocyanine cation radical complexes: synthesis and properties

Afanasiev, Pavel Bouchu, Denis Kudrik, Evgeny V. Millet, Jean-Marc M. Sorokin, Alexander B.Oxidation of N-bridged diiron tetra-tert-butylphthalocyanine ((FePcBu)-Bu-t)(2)N with (BuOOH)-Bu-t in halogenated solvents afforded mu-nitrido diiron (IV) phthalocyanine cation radical complexes, (X)PcFeIV-N-(FePc+center dot)-Pc-IV(X) (X = Cl, Br), as evidenced by UV-vis, electron paramagnetic resonance (EPR), electrospray ionization mass spectrometry (ESI-MS), Mossbauer, X-ray absorption near edge structure (XANES) and extended X-ray absorption. ne structure (EXAFS) data. Continuous introduction ESI-MS showed the initial formation of the t-butylperoxo diiron complex (BuOO)-Bu-t-((FePcBu)-Bu-t)(2)N followed by intermediate formation of a monohalogenated adduct which gave the dihalogenated complex as final stable product. Fe K-edge EXAFS analysis of (X)PcFeIV-N-(FePc+center dot)-Pc-IV(X) showed bridging N atom at a distance of 1.69(1) angstrom. The distance between two equivalent hexacoordinated in-plane iron (IV) centers is 3.39(1) angstrom. Fe-X bond lengths are 2.33 and 2.54 angstrom for X = Cl and Br, respectively. The use of (Cl)PcFeIV-N-(FePc+center dot)-Pc-IV(Cl) for the catalytic oxidation of organic substrates has been shown for the first time

High-valent diiron species generated from N-bridged diiron phthalocyanine and H2O2

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Experimental characterization of the overburden effect

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