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Oxygen Reduction Catalyzed by a Fluorinated Tetraphenylporphyrin Free Base at Liquid/Liquid Interfaces
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SYSNO ASEP 0348915 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Oxygen Reduction Catalyzed by a Fluorinated Tetraphenylporphyrin Free Base at Liquid/Liquid Interfaces Tvůrce(i) 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)Zdroj.dok. Journal of the American Chemical Society. - : American Chemical Society - ISSN 0002-7863
Roč. 132, č. 39 (2010), s. 13733-13741Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova tetraphenylporphyrin ; electrocatalysis ; liquid/liquid interfaces Vědní obor RIV CG - Elektrochemie CEP GA203/07/1257 GA ČR - Grantová agentura ČR OC 177 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000282864100044 DOI 10.1021/ja103460p Anotace 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. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2011
Počet záznamů: 1