Fig. 2. (A) A TEM image of FP-Pdots in aqueous solution; (B) normalized absorption and emission spectra of FP-Pdots (12 μg mL–1) in aqueous solution; (C) emission spectra of FP-Pdots (12 μg mL–1) in H2O under the different O2 concentrations; inset: the emission photos of FP-Pdots in the presence and absence of O2; λ ex = 375 nm. (D) Plot of R I 0/R I as a function of O2 concentration; (E) phosphorescence decays of FP-Pdots in aqueous solution saturated with N2 or air, monitored at 656 nm from the Pt(ii) porphyrin moiety; λ ex = 405 nm. (F) Plot of τ 0/τ as a function of O2 concentration (λ ex = 405 nm).
