Metalloporphyrins and fullerenes have been extensively used for modification of electrode surfaces and subsequent applications in the fields of sensors and catalysis.^1,2 Metalloporphyrins as electrode surface modifying agents are very attractive because of their redox tuning by the choice of metal ion in the macrocycle cavity and peripheral substituents on the ring.¹ Recently, fullerenes have also shown promise as materials for electrode surface modification.² The present contribution deals with the porphyrin and fullerene surface modified electrodes developed for sensor and catalytic purposes in our laboratory. Specific examples to be discussed include: electrocatalysts for a direct four-electron reduction of dioxygen to water at elevated pH conditions by using ion-pair metalloporphyrin dimer modified electrodes;³ electrochemical sensors for dioxygen detection in solution by using electrodes modified with condensation polymer film of β-cyclodextrin hosting cobalt porphyrin redox centers;⁴ electrocatalytic reuction of α,ω-dihaloalkanes by fullerene, C₆₀, modified electrodes;⁵ modification and electrochemical characterization of electrode surfaces by self-assembled monolayers of functionalized fullerene-ferrocene dyads;⁶ and, recognition and catalytic reduction of Cytochrome c by fullerene-palladium modified electrodes.⁷

References
1. Biesaga, M.; Pyrzynska, K.; Trojanowicz, M. Talanta (2000), 51, 209-224.
2. Sherigara, B. S.; Kutner, W.; D'Souza, F. Electroanalysis (2003), 15, 753-772.
3. D'Souza, F.; Hsieh, Y-Y.; Deviprasad, G. R. Chem. Commun. (1998), 1027-1028.
4. D'Souza, F.; Choi, J-p.; Hsieh, Y-Y.; Shriver, K.; Kutner, W. J. Phys. Chem. B (1998), 102, 212-217.
5. D'Souza, F.; Hsieh, Y-Y.; Wickman, H.; Kutner, W. Chem. Commun. (1997), 1191-1192.
6. Hoang, Vu T.; Rogers, Lisa M.; D'Souza, Francis. Electrochemistry Communications (2002), 4(1), 50-53.
7. D'Souza, F. et. al. Manuscript in preparation, (2003).

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