Synthesis of core–shell coordination polymer nanoparticles (CPNs) for pH-responsive controlled drug release

Abstract
Four types of physiologically unstable anticancer “drug-metal” CPNs were “shelled” with pH-responsive “ligand-metal” CPs, which gives rise to a significant release of drug molecules under designated pH conditions and exhibited a higher cytotoxicity against HeLa cells than core CPNs and free drug.