Oxygenation of Polymer-Heme Complexes

Parallel studies were carried out cm the Co(ll)poiphyrin complexes91. We chose two porphyrin derivatives soluble in organic solvents protoporphyrin IX dimethyl-ester (PPME) 38, and tetraphenylporphyrin (TPP) 39. 

PPME = protoporphyrin IX dimethylester, Melm = 1-methylimidazole, BuPy = butyl-pyridine, Py = pyridine, PSP = copolymer of styrene and 4-vinylpyridine (vinylpyridine content 23%, molecular weight 1.1 x 104). 

At room temperature these polymer-Co(II)porphyrin complex, except CoMb, were irreversibly oxidized to the Co(HI) complexes. Oxidation of the Fe(II)-por-phyrin complexes proceeds more rapidly than that of the Co(II)porphyrin complexes. The next section deals with attempts to make polymer ligands act as inhibitors to the irreversible oxidation of metalloporphyrin complexes. 

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