Functional metal‐porphyrazine derivatives and their polymers, 4. Synthesis of poly(styrene) bonded Fe(III)‐ as well as Co(II)‐4,4′,4″,4″′‐tetracarboxyphthalocyanine and their catalase‐like activity

Metal‐4,4′,4″,4″′‐tetracarboxyphthalocyanine [Metal = Fe(III), Co(II), Mt‐taPc] were synthesized by the hydrolysis of metal‐4,4′,4″,4″′‐tetracarboxamidephthalocyanine (Mt‐tamPc). These metal‐taPc are soluble in water and in aprotic polar solvents such as N,N′‐dimethylformamide. Poly(styrene) bonded Mt‐taPc was synthesized by Friedel‐Crafts reaction of poly(styrene) with Mt‐taPc tetraacid chloride. The polymers contain about 4 mole‐% Mt‐Pc rings which are covalently bonded to poly(styrene). The decomposition reaction of hydrogen peroxide by catalysis with polystyrene containing Mt‐Pc rings was carried out in heterogeneous aqueous media at pH 7,0. The polymer catalysts show a catalase‐like activity. The activation energies with the polymer bonded Mt‐Pc were found to be about half of those with Mt‐taPc. From continuous flow experiments in a column, the polymer attached catalyst was found to be very stable, compared with free Mt‐taPc.