Sk. Adhikari et al., MICELLAR CATALYZED REDOX REACTIONS OF BILIRUBIN IN CTAB MEDIUM - A PULSE-RADIOLYSIS STUDY, International journal of chemical kinetics, 26(9), 1994, pp. 903-912
The reaction of CO2.- with bilirubin which is not detectable in homoge
neous aqueous medium proceeds almost with diffusion controlled rate in
CTAB micellar system. This could be explained on the basis of catalys
is caused by the possible electrostatic surface potential of cationic
CTAB Micelles. The rate constant for the oxidation of bilirubin by hal
operoxyl radicals have been shown to increase with increasing solvent
polarity. Although the polarity effect was small, it followed a trend
in the expected direction. Micellar effect was not observed in the oxi
dation reactions when alcohol was present in high concentration. But a
small increase in the rate constant was observed when alcohol concent
ration was lower. (C) 1994 John Wiley & Sons, Inc.