Elsevier

Applied Surface Science

Volumes 65–66, 2 March 1993, Pages 355-361
Applied Surface Science

Thin films of semiconducting polymeric porphyrins

https://doi.org/10.1016/0169-4332(93)90685-5Get rights and content

Abstract

New thin films of meso-tri(N-methyl-4-pyridinium)-p-phenoxymethylene-p-vinylbenzene-porphyrinatocobalt(II) [PVPCo(II)], meso-tri(N-methyl-4-pyridinium)-p-phenylene-5′-O-2′,3′-O-isopropylideneuridine-porphyrinatocobalt(II) [PUPCo(II)], and meso- te- trakis-p-phenylene-5-O-2′,3′-O-isopropylideneuridine-porphyrinatocobalt(II) [TPUPCo(II)] porphyrins growing on Pt, GC, and indium-tin oxide (ITO) electrodes are described. These polymeric films are of interest both for their significant electrical conductivity and as electrode coating materials that exhibit new patterns of catalytic reactivity in the oxidation of methanol and the reduction of oxygen. PVPCo(II) is six times, and PUPCo(II) and TPUPCo(II) are each two times more reactive than Pt as catalysts in MeOH oxidation in basic media. All of the films show a catalytic effect in the reduction of oxygen. Electroreduction of oxygen on the new polymeric porphyrins promotes the four-electron reduction directly to water.

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    • Merging pyridine(s) with porphyrins and analogues: An overview of synthetic approaches

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      The catalytic studies have shown that the film based on 165a is six times more reactive, and 164b and 165 are also twice more reactive than Pt as catalysts in MeOH oxidation in basic medium. All films were able to promote the four-electron reduction of oxygen directly to water [192]. Porphyrins with only one pyridyl unit were also considered by the scientific community under different contexts.

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