Adsorption and Catalytic Activity of Hematin on Polar
and Nonpolar Carriers

O. M. Poltorak, M. N. Veselova, and E. S. Chukhrai

Faculty of Chemistry, Moscow State University, Vorob’evy gory, Moscow, 119899 Russia

Received November 12, 2002

Abstract—The adsorption of hematin on the surfaces of alumogel and graphitized carbon black and on the sur-
faces of alumogel and carbon black modified with lecithin contributes to in an increase in its catalytic activity.
As the degree of filling increases, the specific catalytic activity of adsorbed hematin decreases considerably. At
high degrees of filling, hematin layers on alumogel are virtually inactive. The specific activity of similar layers
on graphitized carbon black is approximately equal to that of homogeneous solutions of hematin. It was shown
that the decrease in the activity of adsorbed hematin observed at high degrees of filling is associated with a
higher activity of isolated molecules as compared with that of associates, the concentration of which increases
with the degree of filling.

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