A5083108423- Electrochemical Analysis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Metal-Catalyzed Oxygenation Mechanisms
- Chemical and Physical Properties in Aqueous Solutions
- Ionic liquids properties and applications
- Analytical Chemistry and Chromatography
- Electrocatalysts for Energy Conversion
- Conducting polymers and applications
- Photosynthetic Processes and Mechanisms
- Molecular Junctions and Nanostructures
- Magnetism in coordination complexes
- Photochemistry and Electron Transfer Studies
- Inorganic and Organometallic Chemistry
- CO2 Reduction Techniques and Catalysts
- Metal complexes synthesis and properties
- Photochromic and Fluorescence Chemistry
- Radioactive element chemistry and processing
- Zeolite Catalysis and Synthesis
- Hydrogen embrittlement and corrosion behaviors in metals
- Photodynamic Therapy Research Studies
- Molecular Sensors and Ion Detection
- Advanced Chemical Sensor Technologies
- Concrete Corrosion and Durability
Laboratoire Chimie Electrochimie Moléculaires et Chimie Analytique
1997-2020
Université de Bretagne Occidentale
2003-2016
Centre National de la Recherche Scientifique
2003-2016
Laboratoire de Chimie
1996-2008
Universidade do Porto
2006
Rede de Química e Tecnologia
2006
Stanford University
1981-1999
Université de Rennes
1997-1999
New Mexico State University
1998
Laboratoire des Sciences et Techniques de l’Information de la Communication et de la Connaissance
1998
Abstract
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of a superoxo complex the dicobalt cofacial diporphyrin [(.mu.-O2)Co2(DPB)(1,5-diphenylimidazole)2][PF6], structure parent Co2(DPB), new synthesis free-base H4(DPB)James P. Collman, James E. Hutchison, Michel Angel Lopez, Alain Tabard, Roger Guilard, Won K. Seok, A. Ibers, Maurice L'HerCite this: J. Am. Chem. Soc. 1992, 114, 25, 9869–9877Publication Date (Print):December 1, 1992Publication History Published online1...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of Cofacial Metallodiporphyrins Involving Cobalt Lewis Acid Metals: New Dinuclear Multielectron Redox Catalysts Dioxygen ReductionRoger Guilard, Stephane Brandes, Catherine Tardieux, Alain Tabard, Maurice L'Her, Claudie Miry, Pascal Gouerec, Yasmina Knop, James P. CollmanCite this: J. Am. Chem. Soc. 1995, 117, 47, 11721–11729Publication Date (Print):November 1, 1995Publication History Published online1 May...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBis(2,3-naphthalocyaninato)lutetium(III) and (2,3-Naphthalocyaninato)(phthalocyaninato)lutetium(III) Complexes: Synthesis, Spectroscopic Characterization, ElectrochemistryFrancois Guyon, Annig Pondaven, Pierre Guenot, Maurice L'HerCite this: Inorg. Chem. 1994, 33, 21, 4787–4793Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 October...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTClose Structural Analogues of the Cytochrome c Oxidase Fea3/CuB Center Show Clean 4e- Electroreduction O2 to H2O at Physiological pHJames P. Collman, Miroslav Rapta, Martin Bröring, Lubica Raptova, Reinhold Schwenninger, Bernard Boitrel, Lei Fu, and Maurice L'HerView Author Information Department Chemistry, Stanford University Stanford, California 94305 Cite this: J. Am. Chem. Soc. 1999, 121, 6, 1387–1388Publication Date (Web):January 27,...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and spectroscopic properties of dimeric cofacial porphyrins with nonelectroactive metal centers. Delocalization processes in the porphyrin .pi.-cation-radical systemsYves Le Mest, Maurice L'Her, Neil H. Hendricks, Kimoon Kim, James P. CollmanCite this: Inorg. Chem. 1992, 31, 5, 835–847Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March...
The reactivity toward dioxygen of two series dicobalt cofacial diporphyrins in solution an aprotic solvent is described. Some these compounds are efficient electrocatalysts for the four-electron reduction when adsorbed on a graphite electrode immersed aqueous acid. Their electrochemical and spectroscopic (UV−vis, EPR) behavior shows that, contrary to what observed with cobalt monomers, neutral [PCoII CoIIP] (1) (P stands porphyrin ring) form does not react dioxygen. Uniquely one-...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDihydrogen complexes of metalloporphyrins: characterization and catalytic hydrogen oxidation activityJames P. Collman, Paul S. Wagenknecht, James E. Hutchison, Nathan Lewis, Michel Angel Lopez, Roger Guilard, Maurice L'Her, Aksel A. Bothner-By, K. MishraCite this: J. Am. Chem. Soc. 1992, 114, 14, 5654–5664Publication Date (Print):July 1, 1992Publication History Published online1 May 2002Published inissue 1 July...
(1,2-Naphthalocyaninato)lutetium(III), bis(1,2-naphthalocyaninato)lutetium(III), and tris(1,2-naphthalocyaninato)dilutetium(III) have been synthesized in good yields. These complexes were characterized by UV-visible, (1)H NMR, mass spectroscopies electrochemical techniques. Bis(1,2-naphthalocyaninato)lutetium(III) is compared to bis(2,3-naphthalocyaninato)lutetium(III): the correspondance between experimental data theoretical results obtained others emphasized this work. Stacking one three...
The electrochemical oxidation of lutetium bis(tetra-tert-butylphthalocyaninato) (LBPC) and decamethylferrocene (DMFC), as well the reduction LBPC, bis(phthalocyaninato) (LPC), (tetra-tert-butylphthalocyaninato hexadecachlorphthalocyaninato) (LBPCl), has been studied in a thin nitrobenzene (NB) film deposited on surface graphite electrode (GE) by means square-wave voltammetry (SWV). organic film-modified was immersed an aqueous (W) electrolyte solution used conventional three-electrode...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultilayer activity and implications of hydrogen peroxide in the catalytic reduction dioxygen by a dicobalt cofacial bis(porphyrin) (Co2FTF4)James P. Collman, Neil H. Hendricks, Charles R. Leidner, Emmanuel Ngameni, Maurice L'HerCite this: Inorg. Chem. 1988, 27, 2, 387–393Publication Date (Print):January 1, 1988Publication History Published online1 May 2002Published inissue 1 January...
The redox properties of lutetium bis(tetra-tert-butylphthalocyaninato) (LBPC) have been studied in nitrobenzene that is deposited as a microfilm on the surface highly oriented pyrolytic graphite electrodes. behavior modified electrode, which immersed an aqueous electrolyte solution, typical for three-phase electrode (Scholz, F.; Komorsky-Lovrić, Š.; Lovrić, M. Electrochem. Comm. 2000, 2, 112−118). LBPC can be both oxidized and reduced one electron reversible processes. oxidation reduction at...
For half a decade now, extensive studies concerning the synthesis of bimetallic models cytochrome c oxidase (CcO) have been reported. A crucial feature this enzyme is presence copper atom in vicinity heme a3 iron atom. Therefore, observed biomimetic activity three different iron-only (two examples are illustrated here) reported represents really rather intriguing result. series porphyrins has synthesized as oxidase; their 4 e− catalysts reduction dioxygen studied at pH 7. These compounds...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRemarkable oxygen affinity of a mixed valence dicobalt cofacial porphyrin CoIIICoIIFTF4Yves. Le Mest, Maurice. L'Her, James P. Collman, Neil H. Hendricks, and Lisa. McElwee-WhiteCite this: J. Am. Chem. Soc. 1986, 108, 3, 533–535Publication Date (Print):February 1, 1986Publication History Published online1 May 2002Published inissue 1 February 1986https://pubs.acs.org/doi/10.1021/ja00263a044https://doi.org/10.1021/ja00263a044research-articleACS...
The kinetics of the transfer a series hydrophilic monovalent anions across water/nitrobenzene (W/NB) interface has been studied by means thin organic film-modified electrodes in combination with electrochemical impedance spectroscopy and square-wave voltammetry. ions are Cl-, Br-, I-, ClO4-, NO3-, SCN-, CH3COO-. electrode assembly comprises graphite (GE) covered NB film containing neutral strongly hydrophobic redox probe (decamethylferrocene or lutetium bis(tetra-tert-butylphthalocyaninato))...
Two different tren-capped porphyrins—in which the two metals, iron and copper, are more or less off-centered—are shown to be efficient catalysts for reduction of O2 H2O; surprisingly, their iron-only complexes even effective 4e– when adsorbed on a graphite electrode.
Functional analogues of the so-called Fea3–CuB active site cytochrome c oxidase were synthesized to elucidate mechanism reduction O2 H2O. The role each individual structural component, especially CuB center, for catalytic activity was investigated. These quinolinoyl picket iron porphyrins (see picture) shown be efficient catalysts 4 e− dioxygen water with or without a Cu ion in their distal site, clearly demonstrating that center is not essential activity.
F. Guyon, A. Pondaven and M. L'Her, J. Chem. Soc., Commun., 1994, 1125 DOI: 10.1039/C39940001125