Figure 13.

A) Synthesis of mixed‐ligand R‐UiO. B) TEM image of R‐UiO. C) Emission spectra and D) phosphorescent decay of R‐UiO in Hank's Balanced Salt Solution (HBSS) buffer under different oxygen partial pressures with excitation wavelengths of 514 nm and 405 nm. E) Calibration curve of the phosphorescence/fluorescence intensity of R‐UiO on confocal laser scanning microscopy (CLSM) under different O₂ pressures. F) Ratiometric luminescence images of CT26 cells after treatment with R‐UiO under hypoxia, normoxia, and aerated conditions (from left to right) with an excitation wavelength of 514 nm. (A–F) Reproduced with permission. ^[36b] Copyright 2016, American Chemical Society.