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Spectroelectrochemical analysis of ion-transfer and adsorption of the PAMAM dendrimer at a polarized liquid|liquid interface


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Title: Spectroelectrochemical analysis of ion-transfer and adsorption of the PAMAM dendrimer at a polarized liquid|liquid interface
Authors: Nagatani, Hirohisa / Ueno, Takeshi / Sagara, Takamasa
Issue Date: 20-Sep-2008
Citation: Electrochimica Acta, 53(22), pp.6428-6433; 2008
Abstract: Interfacial behavior of the fourth generation polyamidoamine (G4 PAMAM) dendrimer at the water|1,2-dichloroethane (DCE) interface was studied by the cyclic voltammetry and the potential modulated fluorescence (PMF) spectroscopy. The irregular voltammetric responses were observed at positively polarized interfaces. Cyclic voltammogram was strongly dependent on pH and concentrations of G4 PAMAM dendrimer and organic supporting electrolyte. PMF spectroscopy was successfully used for analyzing the interfacial mechanism of the dendrimer by adding an anionic porphyrin derivative as a fluorescent probe. Results of the PMF measurements demonstrated that G4 PAMAM dendrimer was transferred across the interface accompanied by its adsorption step at pH 7, while, in the alkaline condition, the adsorption process was not apparently involved in the interfacial behavior.
Keywords: PAMAM dendrimer / Liquid|liquid interface / Adsorption / Ion transfer / Potential modulated fluorescence
URI: http://hdl.handle.net/10069/17911
ISSN: 00134686
DOI: 10.1016/j.electacta.2008.04.081
Rights: Copyright (c) 2008 Elsevier Inc. All rights reserved.
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/17911

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