Fig. 8. Confocal fluorescence images of HepG2 cells. (a1–a3) Cells that have been incubated with 0.2 mg mL⁻¹ Zr-MOF/AMC for 3 h; (b1–b3) cells that have been pretreated with 500 μmol L⁻¹ NEM for 30 min, before incubation with 0.2 mg mL⁻¹ Zr-MOF/AMC for 3 h. The green fluorescence is recorded at λ_ex/λ_em = 380/440–480 nm.