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Surface electrochemistry of iron porphyrins and iron on tin oxide electrodes



Surface electrochemistry of iron porphyrins and iron on tin oxide electrodes



Analytical Chemistry 49(2): 194-198



During an attempt to form amide linkages between Fe porphyrins and SnO2 electrodes silanized with an ethylenediamine reagent, strong chemisorption of the porphyrin and of Fe(III) on SnO2 was observed. ESCA [electron spectroscopy for chemical analysis; X-ray photoelectron spectroscopy] and electrochemistry of the chemisorbed Fe porphyrin indicated approximate monolayer coverage. Chemisorbed Fe porphyrin and Fe(III) produce large waves at negative (-1.2 to -1.4 V vs. SCE) potentials in nonaqueous solvents which are interpreted as Fe-catalyzed reduction of the SnO2 electrode.

Accession: 006546904

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PMID: 835815

DOI: 10.1021/ac50010a007

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