Fig. 1
Photophysical properties of Ir complexes and characteristics of Ir-NPs. The absorption (a) and phosphorescence spectra (b) of Ir complexes (10 μM) in H2O. pH-sensitive emission spectra of Ir-1 in disodium hydrogen phosphate-citric acid buffer solution (c). Phosphorescence spectra of Ir-1 in H2O/DMSO mixtures with different H2O fractions (fH) (d). The decomposition rate of ABDA (100 μM) for Ir-1 (10 μM) (a) and Ir-2 (10 μM) (b) at pH 7.4, 6.5 and 5.0 under white light irradiation (50 mW/cm2) (e, f). The DLS data (g) and TEM image (h) of Ir-NPs, scale bar: 50 μm. The stability of Ir-NPs in PBS and RPIM 1640 culture medium with 10% FBS (i). The elemental mapping analysis of Ir-NPs (j), scale bar: 50 μm. The absorption and PL spectra of Ir-1 and Ir-NPs (5 μM) (k)