Fig. 4: Self-substrate PET mechanism of NanoPcs.
a Schematic illustration of the electron transfer mechanism of NanoPcs. fs-TA spectra of b NMe in THF and c NanoNMe in H2O upon excitation by 694 nm pulses. * represents excited state species, ▴ represents Pc•−. d The dynamic decay trace and lifetimes of excited states and Pc•− species of NanoNMe within a 3 ns range. e fs-TA spectra of NanoCN in H2O at different time delays upon excitation by 685 nm pulses. f Difference between the oxidation and reduction potentials (shown as e(Eox-Ered)) and the calculated excited energy (E*) of Pcs. “∆G” is displayed in the form of color bars. The redox potentials of Pcs were measured through cyclic voltammetry in DMF containing 0.1 M (n-Bu)4N+PF6–, using glassy carbon as the working electrode, Ag/AgCl as the reference electrode, Pt wire as the counter electrode, with a scan rate of 100 mV·s-1. Ferrocene was used as an external reference. The excited energy of Pcs was calculated by B3LYP/6-31 G* method.
