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Oxygen Reduction Catalyzed by a Fluorinated Tetraphenylporphyrin Free Base at Liquid/Liquid Interfaces
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SYSNO ASEP 0348915 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Oxygen Reduction Catalyzed by a Fluorinated Tetraphenylporphyrin Free Base at Liquid/Liquid Interfaces Author(s) Hatay, I. (CH)
Su, B. (CH)
Méndez, M. A. (CH)
Corminboeuf, C. (CH)
Khoury, T. (FR)
Gros, C. P. (FR)
Bourdillon, M. (FR)
Meyer, M. (CH)
Barbe, J.-M. (FR)
Ersöz, M. (TR)
Záliš, Stanislav (UFCH-W) RID, ORCID
Samec, Zdeněk (UFCH-W) RID, ORCID
Girault, H. H. (CH)Source Title Journal of the American Chemical Society. - : American Chemical Society - ISSN 0002-7863
Roč. 132, č. 39 (2010), s. 13733-13741Number of pages 9 s. Language eng - English Country US - United States Keywords tetraphenylporphyrin ; electrocatalysis ; liquid/liquid interfaces Subject RIV CG - Electrochemistry R&D Projects GA203/07/1257 GA ČR - Czech Science Foundation (CSF) OC 177 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000282864100044 DOI 10.1021/ja103460p Annotation The diprotonated form of a fluorinated free base porphyrin, namely 5-(p-aminophenyl)-10,15,20-tris(pentafluorophenyl)porphyrin (H(2)FAP), can catalyze the reduction of oxygen by a weak electron donor, namely ferrocene (Fc). At a water/1,2-dichloroethane interface, the interfacial formation of H(4)FAP(2+) is observed by UV-vis spectroscopy and ion-transfer voltammetry, due to the double protonation of H(2)FAP at the imino nitrogen atoms in the tetrapyrrole ring. H(4)FAP(2+) is shown to bind oxygen, and the complex in the organic phase can easily be reduced by Fc to produce hydrogen peroxide as studied by two-phase reactions with the Galvani potential difference between the two phases being controlled by the partition of a common ion. Spectrophotometric measurements performed in 1,2-dichloroethane solutions clearly evidence that reduction of oxygen by Fc catalyzed by H(4)FAP(2+) only occurs in the presence of the tetrakis(pentafluorophenyl)borate (TB-) counteranion in the organic phase. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
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