Accordingly, the results of the kinetics study are shown in Table 3. These results indicate that reactions Rxn6, Rxn9, Rxn16, Rxn19, and Rxn20 have the smallest Gibbs free energy of activation. Consequently, they show values of reaction rate constants limited by the diffusion rate; all these reactions show a k app to the order of 109 M−1s−1. The reaction route that supports the type I mechanism was Rxn20, shown a reaction rate constant of 8.94 x 109 M−1 s−1, while the Rxn6 and Rxn16 reactions support the type II mechanism, which has reaction rate constants of 9.40 x 109 and 9.53 x 109 M−1 s−1, respectively.
Table 3 . Gibbs free energy of activation (∆G , kcal/mol), λ (kcal/mol), diffusion rate constant (kapp , M−1s−1), and apparent rate constant (kapp , M−1s−1) of the photosensitizer capacity of AMP in lipid media, at 298 K.