Scheme 1. The synthesis and biological application of Pt/PtMBCPNSs. (a) Schematic illustrations of the preparation of Pt/PtMBCPNSs and loading of prodrugs. (b) Enhanced ¹O₂ production and selective oxidation of DHN (absorption is abbreviated as Abs, and fluorescence is abbreviated as FL). (c) The application of Pt/PtMBCPNSs in photodynamic therapy and chemotherapy.