Issue 38, 2006
From the journal:

Journal of Materials Chemistry

Electrochemical investigations into ferrocenylphosphonic acid functionalized mesostructured porous nanocrystalline titanium oxide films†

Eugenia Martinez-Ferrero,‡a   David Grosso,‡a   Cédric Boissière,‡a   Clément Sanchez,‡*a   Olivier Oms,b   Dominique Leclercq,b   André Vioux,‡b   Fabien Miomandrec  and  Pierre Audebert*c  

* Corresponding authors

a Laboratoire Chimie de la Matière Condensée UMR CNRS 7574, Université Pierre et Marie Curie-Paris 6, 4 Place Jussieu, Paris cedex 5, France
E-mail: clems@ccr.jussieu.fr

b Chimie Moléculaire et Organisation du Solide, UMR CNRS 5637, cc 007, Université Montpellier 2, Place E. Bataillon, Montpellier cedex 5, France

c Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires, UMR CNRS 8531, Ecole Normale Supérieure de Cachan, 61 Avenue du Président Wilson, Cachan cedex, France

Abstract

Titanium dioxide nanocrystalline mesoporous thin films were prepared by the evaporation induced self assembly process onto a SnO2–F (FTO) electrode and post-functionalized by ferrocenylphosphonic acid as a grafted electrochemical probe. We showed that the pseudo-diffusive electron hopping between the redox species is related to the specific order of the TiO2 layer mesoporosity. The electrochemical measurements exhibit a very unusual behavior for a modified electrode as far as the slopes of the log Ivs. log t curves are concerned, featuring a charge transfer occurring in a strongly anisotropic medium. The electronic diffusion coefficient values have been determined and fit well with results obtained for similar materials using soluble redox probes. This study demonstrates that efficient charge transfer can be driven when organic components are grafted onto the porous surface of mesotructured TiO2 semiconducting films.

Graphical abstract: Electrochemical investigations into ferrocenylphosphonic acid functionalized mesostructured porous nanocrystalline titanium oxide films

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Article information

DOI
https://doi.org/10.1039/B608607C
Article type
Paper
Submitted
16 Jun 2006
Accepted
24 Jul 2006
First published
24 Aug 2006

J. Mater. Chem., 2006,16, 3762-3767

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Electrochemical investigations into ferrocenylphosphonic acid functionalized mesostructured porous nanocrystalline titanium oxide films

E. Martinez-Ferrero, D. Grosso, C. Boissière, C. Sanchez, O. Oms, D. Leclercq, A. Vioux, F. Miomandre and P. Audebert, J. Mater. Chem., 2006, 16, 3762 DOI: 10.1039/B608607C

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