Sulfates tetraphenylporphyrin

Cyclic voltammetry of iron(III) porphyrin-sulfate complexes has been described. Thiosulfate can add to iron(III) porphyrins to give an adduct which is high-spin at normal temperatures but low-spin at low temperatures. The tetraphenylporphyrin adduct undergoes decomposition slowly in DMF to give [Fe (tpp)] plus tetrathionate. In DMSO tetraphenylporphyrinatoiron(III) oxidizes thiosulfate by an autocatalytic process. Tetrathiotungstate complexes of iron(III)-tetra-phenylporphyrin undergo spontaneous reduction to iron(II) products with a half-life of about 30 minutes at ambient temperature. " ... 

SDS = sodium dodecyl sulfate tacn= 1,4,7-triazacyclononane terpy = 2,2, 6, 2"-terpyridyl, (72) tpa = tris(2-pyridylmethyl)amine, (58) tpp = tetraphenylporphyrin... 

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