Published Paper Details:

Micelles are treated as enzyme-like particles and micellar catalysis was used to mimic enzyme catalysed reactions. In order to get in-depth knowledge of enzymatic reactions, the electron transfer reactions were carried out in the presence of Sodium- dodecylsulfate (SDS) micelles. The micellar kinetic data shows fractional order dependance on Phenylsulfinylacetic acid , PSAA and the operation of Michaelis-Menten kinetics is inferred from the linear double reciprocal plots of k1 versus [PSAA] with finite intercept on the rate axis. The kinetic data shows first order dependence with respect to Iron (III) polypyridyl complex ,[Fe(NN)3]3+ and the rate constant is found to increase with increase in [H+]. From the study of substituent effect it is clear that both ERG and EWG accelerate the reaction rate. On applying Hammett correlation between substituent constant ? and kov of meta- and para-substituted PSAAs, a nonlinear Hammett plot was obtained. The micellar catalysis observed here is as expected since one of the reactants is a cation [Fe(NN)3]3+ and the other one is neutral PSAA . Hence, both can bind with the anionic micelle by electrostatic and hydrophobic interactions respectively.