Rhenium(I) pyridocarbazole complexes with photoinduced antiproliferative activity are reported. The substitutionally inert complexesinduce cell death by singlet oxygen generation upon irradiation with redlight (λ ≥ 620 nm), while only weak background cytotoxicity is observed in the dark. Due to their ability to inhibit protein kinases (nanomolar IC50 values against Pim1 at 10 μM ATP), this class