... of the concentration of imidazole inthe presence 0.4 lm catalyst: (s) Fe(ToCPP) (d) 13G10±Fe(ToCPP)(h) a,a-1,2-Fe(DoCPP) (j)13G10-a,a-1,2-Fe(DoCPP) (n) a,b-1, 2- Fe(DoCPP) (m) 13G10-a,b-1,2-Fe(DoCPP).Table ... In¯uence of the addition of imidazole on the peroxidase activity of Fe(ToCPP), a,a-1, 2- and -a,b-1,2-F e(DoCPP) and their complexeswith 13G10. Variations of the initial rate of oxidation of 0.2 ... increasing concentra-tions of imidazole and compared to that of the a,a-anda,b-1,2-Fe(DoCPP ))13G10 complexes. With both a,b-anda,a-1,2-Fe(DoCPP), the rate of oxidation of ABTS by H2O2increased...