Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/72126
Type: Artigo de periódico
Title: Spectroscopic, electrochemical, and microgravimetric studies on palladium phthalocyanine films
Author: Gaffo, L
Goncalves, D
Faria, RC
Moreira, WC
Oliveira, ON
Abstract: The optical properties of palladium phthalocyanine in dimethylformamide, toluene, acetonitrile, and dichloromethane solutions were studied in the visible range of energy. Palladium phthalocyanine in organic medium presented itself as a mixture of monomeric and dimeric species in equilibrium, and it was only in dichloromethane that the monomeric, non-aggregated form predominated. Palladium phthalocyanine films were prepared by casting, and studied by cyclic voltammetry and spectroelectrochemistry. The films showed an electrochromic response from blue to purple, and stability that depended on the applied potential. Electrochemical quartz crystal microbalance experiments indicated that the film exfoliates into solution after applying high values of final potentials. Raman spectroscopy was used to structurally characterize the palladium phthalocyanine film, which showed a central metal with +2 oxidation state that is not affected even when the film is oxidized. Copyright (c) 2005 Society of Porphyrins & Phthalocyanines.
Subject: phthalocyanines
palladium phthalocyanine
electrochromism
thin films
Country: França
Editor: Soc Porphyrins & Phthalocyanines
Rights: fechado
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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