“…Efforts to improve drug delivery are focused on new delivery vehicles, new targeting strategies, and new routes of administration . Nanoparticles such as polymeric micelles, , liposomes, , dendrimers, , and hydrogels , have emerged as promising drug delivery vehicles that enhance therapeutic efficacy by prolonging drug circulation, preventing side effects, improving bioavailability, and enabling tissue targeting. , Nanoscale coordination polymers (NCPs) are polymers that contain metal cation centers linked by ligands in the polymer and can undergo self-assembly into nanoparticles due to this coordination. , NCPs are advantageous for drug delivery due to their ease of formulation, tunable particle size, surface composition, and triggered drug release. − Drug delivery via NCPs uses passive targeting such as the enhanced permeability and retention effect to target tumors: tumor tissues are disorganized and are dilated with pores, resulting in greater accumulation of nanoparticles in tumor tissues than in other tissues. , Stimulus-responsive drug release is achieved by destabilizing the metal–ligand interactions in the NCP particle core. , …”