Metalloporphyrin, surfactant

ORR catalysis by Fe or Co porphyrins in Nation [Shi and Anson, 1990 Anson et al., 1985 Buttry and Anson, 1984], polyp5rrolidone [Wan et al., 1984], a surfactant [Shi et al., 1995] or lipid films [CoUman and Boulatov, 2002] on electrode surfaces has been studied. The major advantages of diluting a metalloporphyrin in an inert film include the abUity to study the catalytic properties of isolated molecules and the potentially higher surface loading of the catalyst without mass transport Umit-ations. StabUity of catalysts may also improve upon incorporating them into a polymer. However, this setup requires that the catalyst have a reasonable mobUity in the matrix, and/or that a mobile electron carrier be incorporated in the film [Andrieux and Saveant, 1992]. The latter limits the accessible electrochemical potentials to that of the electron carrier. 

Luminescence and Photoelectrochemistry of Surfactant Metalloporphyrin Assemblies on Solid Supports... 

The second and third steps involve successive additions of the pyrazine and non-surfactant water soluble metalloporphyrin complexes to the template submerged in the aqueous phase (Steps 2 and 3, respectively). The two-layered assembly is then removed from the water through a protective monolayer of stearic acid to prevent disruption of the film structure (Step 4). If instead of removing the assembly in Step 4, Steps 2 and 3 were successively repeated, multi-layered assemblies having the essential features described in Figure 1 might be realized. 

Figure 2. Representation of the dye assembly construction procedure (O-) stearic acid (-0-) surfactant metalloporphyrin (MTOAPP) and (-0-) water soluble porphyrin...

Metalloporphyrin formation. Our earlier study of metal ion incorporation by TPP was carried out in a benzene in water micro-emulsion (ME) stabilized by cyclohexanol and a few different surfactants (.8). The Influence of Lewis bases, quinoline in particular, was studied in the ME system containing (anionic) sodium cetyl sulfate (SCS). For reasons to be discussed below, it was... 

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