Binding study to sodium cholate aggregates using a kinetic method and the reaction: [Ru(NH3)5pz]2+ + [Co(C2O4)3]3− as a probe

The electron transfer reaction between [Ru(NH3)5pz]2+ and [Co(C2O4)3]3− was studied in the presence of monomers and aggregates of sodium cholate at 298.2 K. The results show a decreasing rate constant with the successive addition of NaC (sodium cholate). To rationalize the dependence of the reaction rate on [NaC] a stepwise self-association model was used. In addition, the kinetic results agree with the form that adds the monomers, which implies that in NaC aggregates the Stern layer is not well defined.