Photoelectrochemical studies on electrodes coated with polymer-bound porphyrin systems

Balasubramaniam, E. ; Natarajan, P. (1997) Photoelectrochemical studies on electrodes coated with polymer-bound porphyrin systems Journal of Photochemistry and Photobiology A: Chemistry, 109 (1). pp. 39-46. ISSN 1010-6030

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Chemically modified thin film electrodes were prepared by the electropolymerization technique using zinc(II) 5-(4'-hydroxy)phenyl-10,15,20-triphenylporphine and anthraquinone-2-(1-pyrrole) monomers. The ground and excited state properties of the zinc prophyrin were examined by steady state absorption and emission spectroscopy in order to determine the type of interaction between the different dye molecules present in the polymeric thin films. Photoelectrochemical cells were constructed using polymer-dye-coated electrodes, and the response to light was investigated in air-equilibrated and deaerated conditions. The photopotential, photocurrent, action spectra and i-V curves were recorded. In addition, the activation energy parameters for charge migration were calculated. A mechanism is proposed for the reaction of molecular oxygen at the electrode with the photogenerated species. The migration of the photogenerated charge carriers in different modified electrodes and the role of quinone are discussed.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Copolymer; Modified Thin Film Electrodes; Photoelectrochemical Properties; Polymer-porphyrin; Sandwich Polymer
ID Code:24377
Deposited On:29 Nov 2010 09:03
Last Modified:10 Jun 2011 05:51

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